So many choices . . .
It really all depends on what you want to do most of the time. I'd turned on a Delta 1440 for three years and was seriously considering moving up to a Vega bowl lathe, since that's what I turn about 85% of the time. I'd researched and test drove just about everything since I thought this would be my last 'big' lathe. The only problem I saw was I'd be giving up almost all spindle work capability. When I suddenly had my budget doubled by my wife (I bought her a Bernina some time back - best investment I ever made!), I immediately went for a Stubby 750. Since then, I've picked up a Jet mini with bed extension for smaller spindle things that I make for craft fairs.
Bottom line, get the best tool for what you want to do the most. There's tons of hype about each brand (no one wants their baby to be insulted), but when you get into the more expensive models, they all are solid machines. Some just do certain things better than others.
Don't forget to consider head stock spindle height - it should be close to the height off the floor of your elbow. Then there's issues of if your old chucks, face plates, tool rests and etc. will work with the new one.