I will probably get Rock Band 3 in a while and then download the pack. Annoyingly it's not compatible with RB2.
What I hate about those games is that you can't really block out certain songs (except for when you are choosing the setlist of course). I was happily playing some RB2 this evening when I was forced to play one of the most awful songs I've ever heard in musical existence: "Chop Suey" by System of a Down. Of course I failed this in Expert at the very last minute and got mad enough to almost chuck the plastic guitar through the window. I can understand some people might like that song (although maybe not

) but I think some of that stuff is such a specific taste that I honestly don't get why they include shit like that.
I think Band Hero came along too late (bought it a few weeks ago) but the song choices in that are much more generic and thus a bit less hectic therefore I think it would appeal to a wider audience instead of Chop Suey and some other mental rock stuff included in RB and GH over the years.