The Rev isn't out until winter of 2006, though. You can pick a GCN up for 100 bucks nowadays. Plus, you've got Resident Evil 4 out right now, and it's one of the best games I've ever played.
Why wait to pay more money for a next-generation console to play a current-generation game, especially if you're not even sure if you want that new console yet? We don't even know what the game library looks like.