Do you mean classical/black metal? I'm not sure if I know any bands of that style that make use of raw production values like Veneficium does, but a few bands I can think of at the moment that may be of interest to you.
Draupnir basically plays classical music with black metal instrumentation. Excellent band!
Comédie Macabre is also very awesome. A bit unique, they mix gothic/classical/black metal/visual kei among other styles.
Tyrant(Jpn) - though I'm not overly familiar with them, aside from their latest album. I really like the classical parts, but the music in general could be a bit better.
You might like Sirius. They are similar to Emperor or like Tartaros, with some classical here and there, or at least on their "Aeons of Magick" album. Fantastic band.