Don't know much about photography, but I can tell you that I just bought a SONY F707 Digital Camera ($1000 US)...
It has a pixel resolution of 2560x1920 (5.0 Megapixel) which is the largest I've seen..
It also has a few other nifty features, but again, I don't know much about photography itself, so I couldn't tell you if it will fit your needs.. But I can say it is an excellent camera and takes great pictures..