[quote name='mrhappi79']Downloaded it, but I'm really disappointed w/GH3's DLC. I bought two copies of it to have 2 guitars only a month ago and now I'm thinking I should've gotten Rock Band instead. They get DLC each week AND you can download songs individually.[/quote]
Rock Band is vastly superior. Not only do they get a lot more DLC, but there's a lot more to do in game. There's also little touches... like on GH, the crowd claps along with you while you are using star power, but once it runs out, they stop. In RB they keep singing along with the song as long as you are playing well.
And Rock Band has a better track list in my opinion, with just as many songs and more variety.
GHIII is a good game... but yeah... i had not touched my copy in months until today. You can use the guitars on Rock Band, you might as well just buy the Rock Band disc and you've already got guitar and bass. Add your xbox headset for vocals. $60 and you've got everything but the drums.