I can't decide which camera to get: Canon SX100 IS or A720 IS. From what I could see, the higher ISOs were identical, and it seemed that the SX100 IS had more purple fringing than the A720 IS. I don't really know though-could anyone give me any advice?
I don't like that the SX100 IS doesn't have a viewfinder, but I like the 10x zoom lens. Will the lack of a viewfinder make any significant difference?

Thanks!