Hi, so I've been looking into getting a DSLR sometime in the near future, and I've more or less narrowed down my choices to the 20D or 450D. The 450D is more like a 10-series camera compared to the 400 and 350D since it has spot-metering and a dedicated ISO button, but it's still not one...and I can get the 20D for quite a bit less. The only gripe I have with the 20D so far is the really small LCD screen. So are there any compelling reasons to choose one or the other? as for lenses, I've decided that I'd like an EF-S 17-55mm f/2.8, but that's a bit out of my price range. The alternatives I've found are the Tamron 17-50mm f/2.8 and the Sigma 18-50 f/2.8, but I'm just wondering if anyone knows of any other good alternatives. Thanks.