Please could someone give, or point me at, a brief guide on the above. I'm looking for a camera replacement for a mini dv camcorder, so it needs to produce half decent video. In terms of quality, is it as simple as AVCHD, MPEG4, motion JPEG, in that order (and/or does 720 v 1080 have a bigger impact) AND APS-C, m4/3, CMOS, CCD in that order Is CMOS rolling shutter less of an issue than the CCD smearing, or is it just different? Do APS-C or m4/3 have similar or other issues? Thanks very much.