Rock Paper Hero

Anyone know when Rock Band 2 is released for the 360? Or even if the pricing will be fairer this time round after EA totally screwed over Europeans last time by adding on some extra ££ compared to what the Americanz paid. I really want to buy a package with all instruments and the game, something people may do come November when Guitar Hero: World Tour (featuring the leg-end that is Sting no less). So yeah what to buy, GH or RB? Opinions via comments please!