Where are you? What waters do you fish? What sort of flies?

If you really want to replace everything with glass, you've chosen those configurations for reasons, and those considerations won't really change.
Although some different considerations might arise. For instance, lots of trout graphite guys don't expect a 6 to be any fun with dries, or smaller fish, find out they're wrong, and end up getting some more versatility.

My go anywhere/fish anything recipe is 8'-7 or 8wt-DTF; the DT line has several feet of ~3wt line before tapering up to the level 8 main line and with a self build tapered leader offers a range of versatility. If the rod is soft enough in the tip and stout in the butt (as many old glass were/are) it can go from brookies to bass. I can't cast well enough to use streamers with <6wt or bulky bugs with a 6wt. And, I don't want to carry several outfits, or limit me to one fly type for the day. The 8' is long enough to mend or roll cast with and short enough to fish under most trees.

I fish small and medium sized streams in the Pacific NW. the flies are mostly #14 and #16 dries.

I wouldn't sell any of those rods until you get a replacement. The Scott's and Winston especially.

Since you fish those waters with just one rod under 8’ I assume you feel they don’t need shorter. For my small waters I’ve got a number of under 8’ 3 & 4 wts., although those shorter than the Scott don’t get used much. If you decide to look that way I’d recommend the Barclay 72 or 68, his older 7’2” 3 wt., any Morgan, a FF70, or (extrapolating now) Paddock 7’ 5 wt., Steffen 7’, Kenney 7’3”. And I’ve never fished a Japanese rod but 7’ 3 wt seems to a wheelhouse there.

Don’t over think it. Get a Fenwick FF75 or 756, and take it from there.
Or an FF806, or an FF70-4. Or an FF79.
But don’t over think it. Ha ha.

Hello
Welcome To Fiberglass Fly Rodders.
I Really Like The Quiver Your Drawing From Now.
Before we get down to brass tacks I gotta few questions.

First off why Glass and why not Bamboo or Boron ???
How Many Days A Year Do You Fish ?
What are your goals?, What do you want from Fiberglass that you can't get or your not getting from the rods your fishing.??
How long you been fly fishing ? Whats your home water ? Where do you live ?
How many glass rods have you cast,what rods did you like most and what rods did you like least and why ???

Sorry for all the questions,Fitting You With the right glass rods is like fitting you with a new wardrobe.

The Best We Can Hope For Is To Find A Rod Maker Or Collector In Your Neck Of The Woods.

Tight Lines And The Right Tools For The Tightest Loops
Andy M

Why do you think 6wt, is “the center of the universe for trout rods”?

Couldn’t have said it better, and yes I was speaking from a vintage rod perspective. Refinements of casting technique, and attention to the leader length and diameter will get me where I want to go most times. 6 weight is the most functional line for a general cross-section of the fishing that I have done.

I thought 7s were a lot more common than 6s?

Trev, it could be 7 was about as common or more across the 'glass era, which takes in a decade or more of the common D and C line designations, approximately 6 and 7 weights. Such lines were common, and often rods in the 7 ' to 8 1/2' range were unmarked, and pretty much assumed to be for one or the other, and probably both. That's partly why I said you couldn't argue much with calling 7 weights the all around rig of the time. Gradually, the typical range of fly sizes fished expanded at the "small" end, so the 6 weight, then the 5 and 4 became more and more appealing in the early seventies and as graphite developed. I think that's why today it would also be hard to argue that a 7 1/2 or 8' 5 weight wouldn't be the center for a lot of fishing. I guess to know for sure back then, we'd need sales stats and production numbers, and, at least before the mid60s weight-based designations phased in, the most common lengths sold. Most of us are going on our favorite catalogs, memories of the shops we visited, and/or of iconic rods like the FF806. Someone with an old stash of Orvis catalogs could verify or correct my recollection that the Orvis 'glass "all arounder," was, indeed, a 7 weight. I suggested a 6 to the OP because it is pretty much a guaranteed sweet spot for glass that might indicate the direction to go for the next rod, and it doesn't force out any of the nice assortment of graphite rods but would transition well from several of them.

When an angler gets into 'glass rods for the 6 weight lines and up, especially if accustomed to graphite for 4 or less, the different properties of the material and the casting/line handling that goes with it become more apparent. Now the momentum of a heavier weight is greater factor in casting feel, control and distance, the lower line speed a factor in delicacy of presentation (as opposed to the tight-loop/high-line speed needed to deliver a lighter, more aerodynamic projectile the same distance carrying the same "weight"/resistance of a fly).

I guess we could just swap out some of the fine graphites above for some fine 'glass 4 and 3 weights, but I think there is more to it than that for getting the best out of a collection of 'glass rods.

Good Morning
Wow this sure has turned into a popularity contest ! Center Of The Universe aside this person still hasn't gotten any real help in determining what's going to work best for his or her needs.

Honestly I can't imagine how Burkheimer missed the mark,usually he's pretty dam good at fitting the rod to the client,another thing is how do you know those Burkheimer rods aren't the bees knees, you have them both listed as NEW have you taken them out of the tubes ??

See your not really serious about getting the actual help needed or you would have answered my questions.
That's okay you guys can go ahead wasting each others time with your popularity contest while those amazing Burkheimer's sit in the closet.

I'd be willing to bet if you took the time to really get acquainted with either of of those rods you'd probably look no further.
Id go double or nothing that if you went up a line weight with the rods you would get more of a Fiberglass feel from the rods, deeper flexing,You should ask Burkheimer I'd imagine he's agree.

Glass is an amazing rod making material, however an amazing fly rod can be made from any material, the difference is very often the Maker and not necessarily always the material.

Tight Lines And Custom Made Loops
Andy M