Regarding the appropriate phono cable termination for the Dynavector tonearms, I can tell you that my Dynavector DV507 MkII tonearm requires a 5-pin DIN connector - that is, the same connector found in the SME tonearms. I assume that the DV505 tonearm uses an identical 5-pin DIN connector, but I can't be certain of this.
Consttraveler, which Analysis Plus cable did you audition in your system? I believe there are three different models offered by AP: the Low Mass Oval (about $400 retail), the Solo Crystal Oval (abut $600 retail), and the Silver Oval (about $900 retail). I happen to own both the Analysis Plus Silver Oval phono cable and the Synergistic Research Tricon phono cable.
In my audio systems, the Synergistic Tricon cable is better than the AP Silver Oval cable. The sound of the Tricon cable is more natural, whereas the Analysis Plus cable has just a bit of "hi-fi" sound (subtle treble coloration). In addition, the Tricon cable is better at resolving space.
Both cables are excellent, but, in my case, the Synergistic Tricon cable won the contest. As a result, I am running the Tricon cable in my reference system, and I have moved the Analysis Plus Silver Oval cable to the analog rig in my SET system.
Another cable that is worth considering is the Hovland Music Groove. I have not personally heard it in my system, but people whose ears I trust indicate it is one of the top phono cables available - and the price is about the same as the Synergistic Tricon and AP Silver Oval cables.
I believe The Cable Company carries all three of these brands. Why not audition two or three of these cables under the lending library program and pick the one that suits you and your system the best? (If you are located outside the U.S., this may not be an option.)