Well I have both the DVR XP and Powermatic 2540B
Whenever my visas, master cards and other credit bills exceed my gross income, I compensate for it by denying the whole thing and going out and spending more. At the Louisville show, I bought a Nova dvrxp and then called my local dealer and ordered a powermatic 3520B. The first one for my shop in VA, the second for my shop in Columbia.
For the DVR XP, I built a wooden stand out of poplar 4x6's , double braced them, put two sheets of 3/4mdf on top and put stand on a mobile stand for a Delta Jointer. The Wooden stand weighs about 200 lbs without the XP on it.Made several errors but nothing major.
What I like about the DVR XP:
No matter what speed you leave it on, when you turn the machine off it starts at a low (you can change it) speed. The increments are very, very steady; Not only can you turn the spindle head without it losing power, but they make an outboard rig for the machine.
What I don't like:
It vibrates, and needs lots of bags of sand to lower the vibration; while you can get a 240 v kit for it, the manufacturer recommends using a surge protector for the computer and I still haven't found a convenient way to get a 240v surge protector. I do use the 110 and am glad that it is hooked to an individual protector.Tailstock is sometimes hard to put back.
Powermatic-
What I do like: It is extremely heavy. Stand weighs a ton. Tailstock is very heavy but easy to put back. I haven't yet felt the need to put bags of sand on it, but this would be easy to accomplish. It feels more powerful than the DVR. The head slides easily and you can position it in the middle of the stand to give it more stability.
What I don't like:
Got used to the DVR's safety feature of starting automatically at slower speed when power is turned off and watched the powermatic slide almost a foot when I put an out of balance large block of wood on it. Don't know where to get an outboard rig for it.
Conclusion:
I like both. If I absolutely had to choose between the two of them, I'd probably go with the Powermatic where I can take it to a local -GREAT Dealer-in Columbia for repair. I have, on the other hand, had very nice help and product service from Tim Geist, and think that most people would be happy with either of them.