Rock Band 3 or any Guitar Hero?

I'm getting one of the two for X-Mas. I'm really leaning toward RB3 because they are taking that huge step with the new controllers and all that, but all the GH games always have better setlists than RB games.

Please debate, discuss, or whatever as long as its on-topic.

Sorry if there is another thread for stuff like this, I would rather have a new thread than read through an old thread :)

My $0.02 : exactly what I said up there, because none of RB games have ANY DragonForce as far as I can see. (I love playing DragonForce on GH :D) But I also play keyboard and bass and I'm loving the new keyboard controller lol.