My DPS power supply arrived on Friday, and I have to give it an enthusiastic thumbs up. For only $400 it really tightens up the timing but keeps all the flow of the music that I love from my WTA.
One thing to note is that you need to use the RCA-style power adapter for the turntable, I didn't think the manual described that too well.
My Dynavector P-75mk2 phono preamp is also hooked up to the DPS now, and I'm going to start some geeky tests soon to try and run all four combinations to see exactly where the improvements are coming. (No DPS, DPS on WTA, DPS on P75.2, DPS on both)
This is a no-brainer upgrade for all WTA owners.