Gama, I get what you're trying to do but you can not convince me to convert now.
I have just spent nigh on $8000 for Canon EF lenses (f2.8 or better from 16 to 200mm @ 35mm frame).
I only had enough left over for the 30D (after adding a GM8, f10 guide scope and guide Toucam, that can also be used for planetary imaging).
I may upgrade the camera body in future but you'll have to pry these lenses from my cold dead hands.
Nikon, just did not rate when I looked closely at the lens reviews.