[font color=\'#000000\']I've had an A1 for a year, and my Stepfather recently bought the A2. I took his A2, put in one of my CF cards, and spent awhile playing with it and taking lots of pictures. The main differences in use are:
- A2 has a noticeably faster shutter release
- EVF viewfinder is nice and improved, but not a HUGE difference
- RAW + JPG option is nice--wish my A1 had that
Other than those, nothing really jumped out and smacked me in terms of differences while in use. In terms of image quality (putting both on tripods and taking the same image with both), there is actually not a huge difference either. The 5MP A1's images upsize nicely, and actually contain a little less noise from what I can tell. The A2 takes excellent quality images, and needs less interpolation to get those nice, big prints. If you use Noise Ninja or some other noise reducing program, the noise is a non-issue between the two. Of course, the A2 will require more memory per shot--small consideration.
Bottom line: I am not upgrading my A1 to an A2. If I had to buy a new digicam today (did not already have the A1), I would unquestionably buy the A2. Good luck![/font]