Doug, how about a Denon 110 or 160. My son has the 110 on a Denon turntable and the sound is very impressive.
The 10x5 is a fantastic match to the Rega arm and, by far, would be my pick on that table. I'm running a 20xL and think it's the finest cartridge I've run under $1k - hell, it may be the finest all around cart I've ever run! You can't go wrong with any Dynavector on a Rega or VPI arm in my experience.
Stan,There is a difference between a high output moving coil and low output moving coil cartridge as you probably know.The low ouput and required loading makes the Denon perhaps a little fussy.. the phono stage you use can be problematic.I think the Dynavector is trying to masquerade as a moving magnet type cartridge.Now you could probably plug that straight into the phono stage,but then you probably are aware of the ins and outs here.
I'd push towards either a Goldring Eroica H or a Denon 160. The Denon is better and natural. The Eroica is a bit warmer and 'lush/romantic' sounding. Grado Ref Platinum is always an option but it's colder.
If you really want the best, goto Audiocubes.com. Spend $200 on a Denon 103 and $100 on the step-up tranny. With that tranny, you can plug the Denon into a standard MM input and it work.
Until you hear a Denon, you don't know what good sound is (I Love My 301 II).