Bought a pair of HV-35's blindly, having not heard them before, based on the copious great reviews I had read; The goal was an excellent pair of pre's on the 'clean, neutral, and balanced' side, to offset my other pair of excellent pre's in my lunchbox, a pair of API 512c's.
The HV-35's are, simply put, astounding. I was afraid they might not be 'exciting', since their primary characteristic is their neutrality. But that's not the case at all. In fact, they excite like MAD, since they make everything sound so unexpectedly good; Deep, full, wide, even tone...You get the sense they're capturing every overtone available to the mic, while handling transients effortlessly.
A pair of Royer R 121's overhead on my drum kit into the HV-35's yield a...perfect...sound. Natural, completely reflective of the sound of the kit in the room. And a funny thing happened a few months ago: One of the pair was making some noise when I turned the input gain before plugging in a mic. So, I plugged in an SM58 real quick to check it out. Yup, it was dead (Millennia took care of it in warranty no prob). Just to A/B it against the other, I plugged the 58 into the second HV-35, and went "Check, check....OMG!" I'm not trying to be dramatic here; I've never heard an SM58 sound that good in my life.
Totally outstanding pre, and quite a value for it's quality, in fact.