So Collings wrote back and said that they use G - .027, C - .036, E - .030, and A - .0245. Those are pretty big, just as they feel!
Worth CT's are (same order) .0244, .0291, .0260, and .0224. In my steel string guitar player mind, that seems quite drastic a change. I have my guitars dialed in very specifically to strings.
The CH's are .0260, .0319, .0291, and .0224 -- this is a little closer to the Aquilas in size. But I think I'm overestimating the extent to which tension factors into set up. With a uke pulling (IIRC) about 50lbs across all strings and a six string acoustic pulling 170lbs, the effect of tension is probably overstated in my mind. The only concern I have is introducing buzz and it sounds as though I shouldn't worry. In addition, nylgut and flurocarbon are different materials and I've heard that, millimeter for millimeter, the fluorocarbon creates more tension. All of this in mind, I think I will just do what all of you wise UUers have suggested and get the damn CT's already! It sounds like I'm in for a treat.
Sorry for the newbie questions! I really do appreciate the advice.
This all makes sense, right? If I'm being an idiot, please let me know!
Thanks!