Did you ever get around to trying a kevlar/poly hybrid?
I'd be curious to hear a review from someone who tries so many strings.
kevlar/poly has been my go-to combo for the last few years, and every time I stray and try full poly or poly/syn or syn/poly, I wish I hadn't.
At the right tension, nothing compares to kevlar/poly for bite, control, and even feel. Power is a little lower than full poly, but if the tension is chosen properly (not too firm but also not too springy), I don't find it to be an issue. There is of course a break-in period because of the kevlar.
BLX Blade 98. 13.58 oz., 12.55", 366 SW. 16x20 (outer mains skipped)
Pre-Stretched Ashaway Kevlar 18g/ZX Monogut Natural 16g, 66/46 lbs