I have shot pictures with my Rebel XT for a couple of years now and love the pictures quality. However, I want a small P&S to carry in my pocket when I can't lug around my DSLR. Will I be disappointed in the picture quality if I buy the new Canon SD850 IS if all I use it for is some basic snapshots? I mean, is there a noticeable difference in picture quality for smaller prints under 400 ISO? The reason I'm asking is that I have an old Olympus P&S and took some pictures with it the other day and all I can say is "Yuch!" compared to my Canon Rebel XT! Talk about over processed.

