The 10x5 is a nice sounding cartridge, but you can easily better it. The Dynavector 20x2 (the low output version) is an obvious upgrade, and I believe you can get a trade-in discount.
I have a 20x low-output (the previous incarnation of the Dynavector), but I prefer the Audio Technica AT33PTG for its neutrality and tracking ability. I also prefer the AT to my Benz Ace and L2 Wood cartridges. I haven't heard the new AT33PTG/II.
http://www.amazon.com/Audio-Technica-AT33PTG-Dual-Moving-Cartrige/dp/B00475S0BU
I have a 20x low-output (the previous incarnation of the Dynavector), but I prefer the Audio Technica AT33PTG for its neutrality and tracking ability. I also prefer the AT to my Benz Ace and L2 Wood cartridges. I haven't heard the new AT33PTG/II.
http://www.amazon.com/Audio-Technica-AT33PTG-Dual-Moving-Cartrige/dp/B00475S0BU