Well, that's a huge misfire from Rock Band... The 360 bundle has a wired guitar... well, fuck that.
So that removes the bundle from consideration. So that means I have to evaluate the value of each peripheral serperately... Microphone = no, you can use the headset if you want to sing. Drums = maybe, at $80 seperately, now I'll be looking at reviews of how fun it actually is. Wireless guitar = probably, but at $80 if they have none available at launch (like with GH2's seperate guitars), I may end up skipping that as well.
Just make the 360 bundle $220 and include a wireless guitar, dammit (or just include rebates with every product, and let people mix and match what they want). With a package that pricey for ONE GAME, your customer should not be left feeling they got an inferior product.