I own a Lyra helikon, used to own a Benz Ruby2 low ouput and recently upgraded the Dynavector XV-1 to XV-1s.
I would whoheartly agree with Raul and Jtinn (even if he is a dealer :) that the XV-1 is significantly better than either the helikon or Ruby.
The ruby in my system seemed to be dark and rather grainy compared to either the helikon or XV-1. Some may say the ruby is a good choice for a brighter system, I would disagree with that. the XV-1 is a lot more natural and relaxed, so it seems to be easier to listen to than the benz regardless.
the helikon is very fast and neutral, however seems to lack the life and natural harmonics that the XV-1 has. I still have the helikon on my other armwand so would like to try the Titan on day.
The XV-1s compared to the XV-1 maintains its great naturalness but adds a little more transparancy and purity in the treble and maybe a little firmer in the bass.
I have not heard the benz Lp, however a friend of mine has the LP and VDH Frog and he seems to prefer the Frog's more vibrant view of music.