So, I am pretty much a loyal Canon user, although I have been looking into a Nikon D3. Basically so far I have a Rebel XT (Paid $675 for) the 20D I am borrowing, a 70-200 F/2.8L without IS (I paid $975.99 for), a 550ex (I paid around $250.00 for this), and the kit lens that came with the XT. That is about all the Canon equipment I own. Would I be completely INSANE to try and sell all this (I know I will take a loss on some stuff) and switch to Nikon? I am sure there are other topics like this, but I wanted to get a more broad opinion.