The difference between Alu Power and Alu Power Rough is minimal. With that said, I have played with both and believe Rough (as expected) bites the ball a little bit more. Since they are priced the same, I prefer Rough.
Regarding Champion's Choice hybrid, I am sure it plays really well, but it is a very expensive hybrid. Gut is the most expensive string out there, and as far as poly's go, Luxilon is the highest priced. Depending on your style of game, gut could break fairly easily - especially given the fact that Rough in the crosses will, over time, kind of saw through the gut mains. It is great for someone like Fed who can afford to string prior to every match and practice session, but for us mere mortals, it can get costly.
Take care.
DH