what's the best is ALWAYS a pissing contest.
my opinion thought. you can't go wrong with an exmark or toro. in my opinion they both provide about the same quality of cut. I can't speak much for the mulching because I don't mulch. only side discharge and bag as needed.
I personally own the toro grandstand. I chose it because that was the first year they came out so the vantage wasn't out yet. I chose it over wright because of the large platform for your feet.
in my neck of the woods toro and exmark are the cheapest price wise as well. and I don't think a wright is any better than a toro or exmark. in fact I think they lack features over toro and exmark.