i bought the canon powershot a75 and absolutely love the camera itself. everyone is amazed by the picture quality and the clarity of the lcd screen. although it is a little bulky, i think it's worth it.
only problem i've found w/ it are the accessories. i dont' know about the other canon cameras but the a75 (and i'm assuming the rest of the A series) uses 1.5v batteries. this means you have to buy THEIR batteries since i can't find 1.5v rechargeable batteries ANYHWERE. that and the camera doesn't come w/ an ac adapter.
since it's starting to cost a lot to get all the accessories for the camera, i suggest taking into account what comes with the camera too (not to add to your indecision or anything!