Originally Posted by
wickerprints
agree with the general provision that glass, especially high-quality glass, is the more important part of the system when it comes to purchasing and upgrading. That said, however, the move from APS-C to 35mm sensors is a huge one, and it will have a very pronounced impact on the objective quality and subjective aesthetics of your images. Entire lens collections have been re-thought over such a transition. And the jump from the XTi to the 5D2 is really, really huge. You get a much more detailed and noise-free image, much better low-light capabilities, better handling, and more robust build, not to mention video capability. So this is not a decision to be made on the basis of generalities.