Well, Im currently shooting with a 5D. I would like a second 1.6x body mainly for my 100-400L and my 100mm macro. Its a cheap way to attain more FL and retain the IQ. lol. I thought it would make sense for me to save and get the 20D since I would be using my 5D for everything else. Am I missing something? Any input would be appreciated! I plan on purchasing the 20D tomorrow. I'm also getting this used. Would anyone think used is better than refurbished? Thanks!!