As I said above, the Zephyr is my primary and the DV 20X2 H is my back-up. Obviously, I like the Zephyr better.
My impressions? On every level that one would compare carties, I think the Zephyr does a better job.
Here's something else to think about. I don't care how much you spend on a carty -- $500 or $5000 (e.g., Benz LPS). Stylii wear out and there's no getting around it - period.
But here's the good news. Peter Leddermann retips the Zephyr for $150 and then you're good for another 1500-2000 hours. I bet the DV requires a re-build, if it's even worth it.
Last point. The buzz is that Harry Weisfeld (sp?) of VPI and Peter Leddermann of Soundsmith collaborated on designing the Zephyr to be compatible with the VPI JMW uni-pivot wand. And it is. By contrast, the Traveler arm is fixed gimbel, which means it's more stable than the JMW uni-pivot. That makes set up and carty choice a lot easier.
Just my opinion.