I tried out Capture One 3.6 Pro yesterday with a few of my 20D RAW files. I've always used other converters, so I'm sorry if you guys already know how great C1 is, but I decided to give C1 a try, and WOW! This program beats everything else I've ever used. 20D files tend to have slight color banding/noise in certain conditions, especially in shadows, but C1 gets rid of all color noise, and instead, makes it very fine grained, non-colored specs. It's amazing. It also captures noticeably more detail than any other RAW converter I've used. The images are sharper, less noisy, no color banding or patterns at all, and just look better, even when I enlarge the file by 200 percent.
I haven't really had any banding problems with my 20D, but if you are, C1 will clean it right up. It might be doing some noise reduction, but I can't say for sure, since my images from C1 look much sharper and cleaner, with NO color banding. Just wanted to let that out, I'm just amazed. Ok, I'm done now.
T-1000