Nice gun. Good buy. I agree with leaving it stock. I have a 10 year old M1A that I finally tried to set up with a scope mount. It isn't too bad (2" group with some reloads), but I'm not sure it was worth it. You'd likely be better served focusing on accuracy with the good iron sights.
If you don't already know, the Checkmate Industries (CMI) magazines sold by 44mag.com are good mags that are GI spec. I have not had any luck at all with cheaper aftermarket mags. They are okay for practice, but not dependable.