WIxthus,
How important are the looks? Also, what's your feeling about more modern (disk drag reels)? Oh, how much are you willing to spend? I don't normally worry about reel weight until I've fished a rod with the reel. You add quite a bit of weight when you add the line and backing. I would fish it with what you have for a while and then think about it.
That is a beautiful rod and if you want to match the rod, I feel a lighter colored reel would look the best (not black and not silver). Antiqued brass looks great with it. For a modern look, I might try a Marryat Bronze MR8 the MR8 can handle a lot more line, but it allows you to play with the weight by adding backing or even an oz of lead tape under the backing.
Here's an MR8 on a Proof build (not as pretty as the Barclay, but the colors are at least similar).
Here is a medalist on a the same rod (with less dramatic lighting)
If you are willing to go to black reels
If you can find a solid spool Ross R2, that would be a fantastic looking reel.
The Gunnison G2 is a workhorse, but real beauty would be a San Miguel Two (though a 3 might be better if you want a DT line)
I also have been fishing Abel pt.5 in the 5/6wt. A pt.0 might also work out well.
Good luck and don't worry about it too much.