Well, I've been agonizing over this decision for a year now but finally put it to rest last night. I ordered a Canon 5D so that I'll have time to get used to it prior to the Glacier trip. This means selling off almost 20 years worth of Minolta gear and that decision did not come easily. I'm even selling my rough Mamiya 645 1000s as it just does not get used anymore and I feel the 5D will serve me well enough for now. So Tony, is my 17mm prime going to be wide enough on my 5D?? I've never been there with anything wider than a 20mm before and it's my worse lens for image quality. Can't wait to get up to glacier with the new gear. I've been shooting a Contax 28/2.8 Distagon on the 30D for two weeks now and that lens is awesome. I can't wait to slap that on the 5D.