I'm an old school thrasher too, but I'm beginning to think there isn't any good black metal. Dissection is sorta decent, but the rest of the bands that got mentioned just blow. And I agree with you 100%, the corpsepaint and keyboards is severely queer. And naming yourself shit like "Quorthon" or "Asmodeous" like Black Metalers do is retarded.
I think you'd probably be ok with Dissections "Storm Of The Lights Bane - Where Dead Angels Lie", cause you mentioned you like technical metal and its Black Metal in more of a technical direction, but doesn't suffer from the "recorded on an answering machine in a bus station mens room" that most Black Metal does. But other than that, I think all the bands that have been mentioned in this thread are pretty crappy. Well except for Cannibal Corpse and I gotta give "Funeral Portrait" props for recognizing the best band going these days, but at the same time I want to smack him for labeling them Black Metal. ( Sorry Funeral Portrait
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Whatever you do, don't spend any money on Burzum, Bathory, or Carpathian Forest, or most of the other bands people mentioned, 'cause its basically crap. No offense, to anyone, but I've ripped farts that sounded better than Burzum or Bathory.
Well congratulations of being open minded about listening to some Black metal, I'm sure I'll go down in flames for my comments, but if you listen to those bands you'll see for yourself.