I'm a cheap SOB, so I've never tried Power Pro. Must be something to it though with the price that it commands and the fact that Walmart locks the stuff up.
I use a lot of Stren Sonic 14lb braid on my medium rods and it seems to work really well. Only thing is, it's definitely not good for more than 2 seasons. After that the stuff will break at the knots a lot. It casts EXCELLENT though, and I can get within inches of where I want to be when casting up under trees and other structure from far away.
For the rods I spool up with Mono, I'm a big fan of the old fashion Trilene XL. It's a great "all purpose" line. My panfish rods will get that in 6 or 8 lb flavor.