No experience with Nikon, I use a Cannon T1I. I guess you should just buy the shell to save money.
Thats what I think I will do. I like the cannons but am not going to switch now that i have the lenses.
I have a well used d80 I'd consider letting go for pretty cheap.
I have a D40X that I'd be willing to sell. If your interested, let me know and I'll PM you the specifics.