Well having just moved up to the 5D and found that hard to get hold of will add my 2 cents I would wait until you have got the best glass you can afford first if your lenses are top notch ok go for it if not there is more of a difference in lens quality than camera change The price will fall soon and the competition twixt Nikon and Canon is just good news for all of us..

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt