I am contemplating an upgrade sometime next year. My ideas, IF canon makes a 60D and its around $1500...ill may look at that..if not the 50D..but..just around the corner..i was looking at the 5D1. I am curious..noticing that the Xsi(12.2mp) and 5D1(12.8mp)..is not a big difference..but being that it is a full frame..would that make it completely mute as the pixels are bigger?