I sold all of my gear except a few odds and ends back last year and now I've got another kid on the way and want to get some more gear. My problem is that I can't decide what to do. I've had it all at some point; 1D, Rebel, 30D, 40D. I'm considering a 1DMKII, 40D or 50D but I can't decide. I don't do any sports photography, mostly just family stuff, candids and what not so I don't really 'need' the 1D. My question is this: Is the 50D that much of an upgrade from the 40D? I know it has higher resolution and stuff but if it's not worth the extra cost I'd like to know why. I've been all over eBay and have recently been checking out the used stuff at B&H and Adorama. I don't want to spend more than around $900 for everything. Any advice will be greatly appreciated.