Nice!
But if you want the highest quality, everybody knows you want a RAW image. So, if you want that extra bit of quality, just set up your camera on a tripod pointed at the screen, take a photograph and bam! RAW image with your changes saved!
Well, in this case RAW would have too much resolution, you'd get too much of the screen texture. You should choose a size of jpg that is as close to the screen resolution as possible ... and be careful about white balance.