CAL4M1TY on 16 April 2009
I'd say get the Wii.
You're going to play rock band for a while, but you have to think about games after that, and if the Wii library is more appealing than the PS3's, go the Wii.
Also, when it comes to graphics, doesn't matter which platform, Rock band is not a pretty looking game. Plus you'll be too focused on the notes to really take notice.
Whilst PS3 has DLC, keep in mind that DLC
Also, think about your friends and family who will play the game with you, if your friends have PS3 versions or Wii versions of the game, get the same version, because you'll be able to swap out instruments (so your friend can bring his/her guitar to your place and vice versa so you have a full set, without having to buy 2 guitars).
