Densie, if you're doing anything drawing-like perhaps consider a Wacom Bamboo instead of a new mouse. There is a reason all the artists have tablets, and the Bamboo is reasonably priced and works fairly well. It does take a bit of getting used to though. One trick to make the edges less painful... edit at the original RAW dimensions, then downsize. If there's a few bits that are off around the edges, they'll end up blended out into nothingness when you downsample.

Oh, and yes, nice background treatments.