A 40D would be a very nice upgrade for basically what you would spend on the repair or replacement (new) for your 20D. I picked up my 40D in stellar condition (1 owner) for $550. The deal included 3 batteries, digital shutter release, and all original accessories. If you look hard enough, and in this economy, if someone really needs to sell, you may stumble upon one heck of a deal. The 30D may be just a little too familiar, and thus may leave you wondering whether a higher up jump would've been the better choice. Good luck either way!
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