I'm currently shooting with a 450D(XSi) with a 18-55 IS, 70-200 f/4 IS and a 430EXII. I have been considering upgrading to a 17-55 for a constant aperture and then getting a 7D later for improved ergonomics and bigger body to balance the bigger lenses. In total this would work out a £1930 at current prices.
However Jessops currently have the 5D MarkII + 24-105 kit for £2149.95 is £220 more than the 7D + 17-55mm
Is is the AF of 5D MarkII comparable to the 450D also I quite happy with the results I getting from my 450D so would a jump to full frame bring me any benefits or am I better sticking to crop?
All input welcome.






