Ditto, I intend to get them both, in fact my son and younger brother are getting GH3 for xmas, Rock Band is so we can form a band (the likes of which has never been seen). We're just arguing over who's gonna be singing, but I imagine you will be able to disable that embarrassment.
It's funny, right now I'd kill for an extra guitar controller, but by xmas I'll have 4!.
Incidently, have any of you gotten the downloads? - I've bought most of the packs, got Smoke on the Water, Higher Ground, some pretty good stuff, I wonder how much downloads they'll make for GH3!.
We're going down... in a spiral to the ground...