I much prefer the new one. It's less "in your face". The old track is good, but it doesn't really belong on the main menu. It'd do great as an ingame track, though.
Good point. I do like the old track though. It had better appear in the full game somewhere.
Oh, and the longer the soundtrack, the better. I never listen to my own music while playing games, to give myself that "authentic" feel. So if I'm gonna be playing this game 200+ hours, it would be nice to have at least 2-4 hours of music.