I prefer the song selection on the Rock Band games. Much more variety and more bands/songs that I personally enjoy playing and listening to. Looking over the track list for GH4, I probably won't be picking it up--too many groups I have never heard of or wouldn't want to play along with (or are already on RB2). The weekly downloads for Rock Band also put it ahead, in my opinion. I have purchased a lot of extra songs--plus the new option to add all of the RB1 songs to your hard drive gives you a pretty big selection when you play RB2.