I've got a tristar hunter (not EX) that shoots pretty well. I wouldn't have paid for it, but I got in in trade from a very good friend for some guitar amp work. I haven't had any issue with it and the barrels are very well regulated. (sounds like some militia thing I keep hearing about.) I'll probably shoot it until it breaks, most likely one of the firing pins. Spare parts are hard to come by, but I can't complain. Lockup is nice and tight. It fits very well and swings great.
Matt