AOKP, Axiom, TeamBAMF, Gummy, Bugless Beast, CM9, MIUI, Sourcery (coming soon) and many (all?) others. They all offer similar performance, but some have different options than others. Find one(s) that offer the options you like the best, then give her a go. Then try another one if you aren't satisfied with it, or you just get curious about a different one.
TH3ORY Roms, unbelievable work that guy does, best thing about his roms is he is in constant interaction and constantly updating to make it better. Right now the latest stuff I can't imagine can get any better