I have the STX 3000 MegaForce air cooled model, which I got a year ago from
Amazon. I think it was $158 and has performed flawlessly. I do not think the model you are referencing was available at the time or I would have given it serious consideration. I've run hundreds of pounds of meat through mine and had no issues at all. Needed to get some new blades, emailed the manufacturer, got an immediate response, and subsequently the new blades were here in a couple of days. In a nutshell, the quality has been there for me and the customer service has been spot-on. Turned out however that I did not need the blades. My issue was operator error by not tightening the lock nut quite enough and fat was building up on the grinding plate. You want to be careful and not over tighten the nut but it needs to be snug enough that the plate is up against the blade so it scrapes the meat off the plate and doesn't clog the holes.
Robert