20 songs? put his whole catalog on there and it would be amazing...have you heard his "Like a Rolling Stone" Live at Monterey?
Yes, though I don't much care for Hendrix. No one does Dylan like Dylan, not even when it's "All Along the Watchtower"
Also, in Band Centric Guitar Hero games they never put just the featured band, they get like 25 songs from the featured band and the rest are from associated acts. unlike The Beatles: Rock Band, which is 45 Beatles Tracks and forth coming full album Beatles DLC.