James, ignore the mosfet bit, it's borderline irrelevant.
50w is the peak out, again, ignore this rating on all headunits, it's irrelevant. Real world output will be ~10w/channel at best.
The SQ won't be any worse than the Bose, JVCs tend to be pretty decent, Alpine and Pioneer are also worth a look.
Looks like a good price for an all in one headunit, depends whether you're looking for high SQ or a multimedia unit?