WDon't forget the larger spindle size (i.e.; 1" X 8TIP vs 1 1/4" X 8TPI), which requires different chuck and accessory adapters at the very least, plus larger tool rests (i.e.; 5/8" vice 1" posts and larger heights...), etc., etc., etc. I don't mean to dissuade you and your new beauty, but these costly upgrades also add to the cost of a major lathe size upgrade...
Kenn,
Once again you have opened my eyes to something that frankly I hadn't considered. I have a Nova G3 Chuck, a PSI Dedicated Pen Drilling Chuck, and a PSI Collet Chuck system, none of which will work directly with the 1 1/4X8 Powermatic. I think that there are a couple of makers of an adapter that will allow me to use them.
As for the 220V issue, that isn't a problem. My garage has 220 that I had wired for my Unisaw. It should be just fine. I don't have anything else that would not work on the Powermatic. My plan is to sell the Jet, the accessories that came with it, and the stand that I built.
Thanks for your input as well as all of the other well considered and reasoned advice provided. The ball is clearly in my court now.