Costco has a Canon A570 IS compact digital camera for sale ($199) and is offering an ATI 80x SD card as a sweetener. Is this a good card, or would I be better off buying one of the new SDHC high-capacity cards? What's the difference; is the speed (e.g., 80x) more important than it being high capacity; and which would make the camera operate better and faster? P.s.--any opinions about this camera or the Canon SD1000, which I am also considering? Thanks.