Technicality is often confused with flamboyancy, when true technical prowess lies in subtle nuances such as variations in picking technique, overall song structure, and displaying slight alterations in riff structure, seldom to be repeated.
Once you realize this, you'll find yourself appreciated that which may be termed "technical" about these albums, which have been recorded with greater clarity (something I believe you indicated you were seeking):
Angelcorpse - This American band is a blend of black metal and death metal, insofar as technical aspects are involved.
Averse Sefira - "Tetragrammatical Astygmata" One of the few times I've encountered crisp production utilized to the advantage of a band.
Enslaved - "Vikingligr Veldi" and "Frost" (as well as "Eld" and "Blodhemn", but I prefer their earlier work)
Gorgoroth - I find technicality in their best works, "Antichrist" and "Pentagram", but I'd suggest giving "Destroyer" a try and working backwards from there? Not technical per se, but there are interesting experiments with "noise" and wandering themes. (Hat, however will always be a better vocalist than Pest or Gaahl.)
Immortal - "Blizzard Beasts" (My favorite track on this album is "Mountains of Might", which coincidentally would probably be most representative of the "technical" sound you are seeking.)
Nokturnal Mortum - "Nechrist" Folk music is technical, and this is the NSBM group's best album, IMHIV+O.
Vinterriket - Not really black metal; I believe their latest album features more black metal elements. However, this ambient band essentially incorporates the aesthetic and atmosphere of intelligent symphonic black metal...minus the black metal.