Koetsu vs Dynavector


I am looking at new (well new to me anyway) cartridges for my turntable. I have found a couple of interesting candidates but given that cartridges are one of the hardest things to purchase because of the problems of arranging home trials, I am interested in other peoples opinions. I am looking at the Koetsu Urushi's (either a Vermillion or a Black) or a Dynavector Te Kaitora Rua or XV1. I realize there is a bit of a price spread at normal retail but there are some demo issues that level the field a bit. My system is as follows Oracle Delphi MkIV with a highly modified Rega arm running into a modified Mod Squad Phono Drive. This all runs into a Sonic Euphoria Transformer based volume control. The amp is a custom tube amp based on the 6L6 tube (using NOS Tung Sol 5881 at the moment). This puts out twenty watts of PP power to a pair of Quad ESL 63. The cables are a mix of Homegrown Audio silver interconnects with Eichman silver RCA jacks and Analysis Audio Silver speaker cables.
My musical preferences lie in the smaller scale more introspective sphere on this system (I have a Altec Lansing based horn setup for rocking out). Anything from Frank and Ella to Johhny Cash to Bob Dylan to Dianna Krall. I also love the instruments that share the vocal sound. I gravitate to cello, saxophone and trombone over guitar and piano. I want to here the tone and texture of the voice as my first priority and timing a bit further down the line. My listening room is a bit on the large side (30' x 50' x 25') and has a very live acoustic. It has polished concrete floors and 115 year old plaster walls (I live in an 1893 Methodist church).
I welcome any opinions but I am mostly looking for people with actual hands on experience with either the Koetsus or the Dynavectors.

Thanks
Dan
djeickme75
OK. The un-examined phono stage is not worth listening to. This is just a hobby; these devices are just interesting toys that have the added benefit of producing great music.
As I remember from the old "Hi-Fi Answers" days, the Koetsu(Rosewood or Black in those days) sounded like the Denon 103. Actually, it was the other way around. Having owned the Rosewood, I have fond memories of its sound(It needs a re-tip.). Now Raul, I'm not sure Djeickme75 knows about your expertise in phono stages and your MM cartridge preferences(with what looks like good reason). I think to fully understand the "source first" argument you had to be there when it was first proposed(by there, I don't mean the USA-they didn't get it.).
If anyone is interested in differences in Koetsus and indeed other cartridges, take a look at the 10audio site, lots of good sensible opinions, though only one persons of course. I used a Rosewood Signature bought second hand on the Gon for 3 years and really loved it. Chenged to a ZYx airy 3 which was just ok. Recently changed to a Benz micro LP, my favourite cartridge ever. They seem to get no respect and they are more costly in the US, cheaper in Europe. The LP will do me for some years, I think