In somewhat relevant news, Guitar Hero Rocks the 80's is out right about now, should you feel that Rock Band is just too far off. (And the purchase is completely worth it, for Flock of Seagulls alone )
I shall be purchasing that soon as my next paycheck somes in. It's not out in the UK till Friday, However, if memory serves correctly.
I'll warn you that the price is a little steep for what is essentially Guitar Hero 2 reskinned, with 30 new songs. If you're looking for non-song content, you'll be disappointed. A few of the characters from GH2 are MIA, and the venues are all the same (but more colourful, of course.)
Still. POWER BALLADS.