I also have two Jet Mini Lathes. They are fine machines but they will not hold up to very heavy turning. I now need a new set of bearings for one of them. But then I turn every day, mostly anyways, and for three or more hours at a time. So my Jet probably gets used more than the average guy would use one.
The variable speed lathes are nice, but you have to keep in mind that you pay an extra 100 bucks for not having to move a belt, which takes all of 10 seconds, and that the belt on the lathe still has to be moved to obtain the highest speeds.
Don't forget to look at the Delta, almost a clone of the Jet but with a few more plastic parts on it. Then there is the Fische lathe, another mini like the Jet but with much easier belt changes. I think my next mini lathe will be a Fische.
Bottom line is the Jet, Delta, and Fische are all good machines and will serve you well if you treat them right and don't try turning on them every single day for hours on end. But then again, once you start, it is really hard to stop /ubbthreads/images/graemlins/smile.gif