very nicely done! i think most anyone would be pleased with your results.
however, we're not anyone

so, with a bit of nitpicking, i'd darken the white shirt also, maybe with som of that sepia tone. i also like the idea of adding a bit of depth to the border, at least on the inner edges. and one thing the others didnt mention is his hair. on the camera left side of his hair, the edge looks a bit too crisp, as if the body was extracted and pasted onto the background. a little softening of that edge might be good. you rarely ever see such a crisp edge like that in a 'natural' photo. the original is pretty close to that also but it really stands out to me in your restore.
ok, enough nitpicking. i still stand by my original 'very nicely done!'. you could do nothing more and it would be quite acceptable in the marketplace. you reach a point where you're asking yourself, 'how good is good enough?'. well, you've reached it. if you wish to do more, then by all means take advantage of the critiques here, but just be aware that this IS good enough.