You may be interested in Clone Hero.
FoF felt so clunky whereas Clone Hero is a delight. It handled high FPS well, the song interface looked exactly like Guitar Hero, and the customizability is the icing on top. The community has ported over basically every song from every Rock Band or Guitar Hero game, so there's more than enough content. Clone Hero was so smooth I bought a wireless receiver to use my old Rock Band drums and play with my wife. It's a blast!