EarlyPorsche,
Think of it this way: If you have never used a Bridgeport style mill than you will probably think the Jet is just fine. Once you do use a real (not hobby) mill, you will realize the limitations of the Jet and probably be in the market for a Bridgeport. (It is a slippery slope, much like our P-cars
)
I have a 9 x 40 Webb (Bridgeport copy) with some crappy tooling in my garage that never gets used. The reason? At work, a couple of miles away, I've got a heavy duty 9 x 48 Sharp with thousands of dollars of top line tooling, so I use that whenever I have a personal project. (Lately though, I'll draw up a model and program one of the CNC mills to do the work. Yes, I have a weakness.)
Good luck,
Jim