Let me say up front that I mean no disrespect to any modern glass rod maker - Pretty much every 3 weight rod I have owned, performs better with a 4 weight line.... but I tend to fish relatively close on small streams or ponds. YMMV of course.

I like my rio creek 3wt wf. Its more of a 3.5 If I had to guess. It casts well on my superfine glass 2wt as well as my douglas 733 3 weight. Its perfect for the douglas but might overload the SFG with more than 20' out. With the douglas it will let me cast big foam hoppers with heavy droppers but is still workable with small dries. It roll casts well on both rods. It has a heavy head and loads either rod with only a foot or two of line out.

Id recommend it.

One note as you look. Generally a DT line is better for roll casting IF you have more than about 30 ft of line out. If you are using a WF line and do not have enough line out to get into the rear taper or running line, you should notice little difference. You mention that you will be fishing in tight quarters with short casts and roll casts which should make casting with either a DT or a WF line about the same. In fact some of the WF lines have shorter front tapers than some DT lines making them turn over better in those conditions.

I looked at the line weights and tapers of some of the lines mentioned. As Big Heavy points out, the Rio Lightline 3 wt is true to AFTMA weights of 100 gr for the first 30 ft. However, the first 30 ft of the Rio Creek "3 wt" weighs 120 gr, which is the AFTMA standard for a 4 wt line. The Rio Gold mentioned weighs 106 gr for the first 30ft which is right at the upper limit of a 3 wt in AFTMA standards. These numbers are worth looking at as you decide what you want to do.

My own rule is that I only buy lines properly labeled to AFTMA standards...but, I am happy to use heavier or lighter line weights on a particular rod, depending on the stream conditions in which I will be fishing. For small streams, short casting, and tight quarters where it will be unlikely that I will have 30 ft of line in the air, I will use a heavier line. The other thing I look at is the front taper of the line. A long, slow, front taper will present very well but it does not turn over as well as a line with a shorter front taper, which I find helpful in tight quarters.

From your comments, it is clear that you are thinking through these considerations. In your shoes, I'd look for a true-to-weight line in 3wt or 4wt (inclined toward the 4 wt) that has a short front taper. Good luck as you proceed and it looks like there is some great advice here from people familiar with that rod.

Im with Bamboozle on leader length. I seldom fish anything other than a 7'5x for small creeks trout or bluegills. For warmwater fish I even go shorter. Ive found that I can easily turn over a 7-7.5ft leader on the sfg2 with the rio creek 3. Then again, seeing as its actually a 4wt apparently, one would hope it would turn over..

I use 3 foot THREAD furled leaders with about 2-3 feet of tippet material for all of my short fishing and have been doing so for decades since I first had a friend twist me up some "three footers" as an experiment.

Before that I knotted my own 6 foot leaders because a store bought 7-1/2 leader was too long and ended up getting longer as the day went on. They worked just fine however, the other reason I like furled thread leaders for this kind of fishing is because I can grease them to float. That helps with pick-up which is a huge plus on the more plentiful riffles I find on small streams.

I have a F2 653 and have cast the F both solid 3wts.I use a SA mastery series trout DT 3 with a 3’ threaded furled leader and 4 or 5’ of tippet.You really don’t feel it load the rod with a couple feet of line off the tip but it does form tight loops is accurate and the rod is a great roll caster.If you need to feel it load a little more Rio gold 3 performs good........Aurelio

I think the new FS663 is slightly more versatile than the F2 and is delightful with a 4 line as well.