I have a 20D and will be picking up an old, but very well cared for original 1Ds in a few weeks. Everything I read online says the 1Ds is slow. Now, surely it doesn't compare to modern cameras, but does anybody know how it compares to a 20D (which I'm quite pleased with). Note: I'm talking about processing speed, not AF, or shooting speed. Thanks! By the way: I own a 50D as well if anyone can compare to that model. Also, did the 1Ds have a DIGIC processor?