Should I get Guitar Hero II (360)

This is my question of the week! I have the money for it, and a $10 off coupon good through next week. It would cost $88 total. I know that Guitar Hero is one of the best games of the year, but I'm not thrilled with the song list. I only recognize about one third to one half of them. How much fun is the game if you don't know the songs?

I just got DDR and I haven't played it much. I'm also receiving games from Gamez N' Flix. Plus I have a huge 360 backlog to finish up. I don't know that it's really worth getting this moment. Can anyone convince me?