Verybig and Carl, Your comments are useless to anyone contemplating a purchase. I think it would be fair to say that the DV tonearms are fundamentally different in design and execution from standard pivoted tonearms. The differences afford certain advantages and disadvantages as compared to the standard type. That does not make them "faulty". Would you say the same about unipivots vs captured bearing types? Which of those two types is "faulty"?
Consttraveler, Yes, warps will affect VTA on the DV507 more so than with a conventional pivoted tonearm. However, who among us that can afford a $5000+ tonearm will tolerate a warped LP? On the other hand, the skating force is never constant at any point across the surface of any LP with music on it. Therefore, what is the advantage of applying constant anti-skate (which I am not sure is constant, since the magnetic AS will change based on any change in distance between two magnets)? "Correct" AS is a crapshoot at best.
I use a DV505, the older model, on my Lenco. Essentially the DV505 is a DV507 with string and weight AS instead of magnetic AS. I also own a Triplanar and a Reed and a FR66S, that I use on other TTs. The DV505 sounds superb with either of two of my favorite MM cartridges, the Grace Ruby and the Acutex LPM320. Choice of headshell should be made with a view to matching the cartridge, since the vertically pivoting part of the arm is so short and light. Headshell becomes more important. Bass response and "detail" are indeed superb, but so is "air".