I'm not too sure about GH IV. It is supposed to release like just Rock Band containing a Drumset, Guitar, Mic only this time it is $189.99 instead of $169.99. Just short of $200...
Me personally, I skipped RB because of the absurd price tag and I shall do the same for GH IV unless my friend who likes to play GH III with me goes half seeing as he doesn't own any system... I own them.
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)