It seems I never have enough toys! I recently upgraded from a 30D to the 5D and (foolishly) got rid of the 30D. I got the 5D for all the reasons that a full-frame brings, but now I find myself missing the crop factor particularly since I shoot wildlife. I am going to Africa in November and I am contemplating getting a second body to take along. I don't want to spend a lot of money - so I am thinking of getting a 40D or even an Rebel Xsi (or another 30D!) to use for wildlife shots with my 70-200 f/2.8 lens and 2x extender. This will give me an effective 640mm over just 400mm with the 5D and the same equipment. I'll use the 5D for landscapes and low light shots. I don't want to invest in (or carry) a longer lens for the 5D. But not so psyched about getting a second camera to lug around either. And ow the 50D is coming out, making the decision even more difficult! Am I crazy for even thinking about this? Any advice? Thanks.