I agree with Aroc on the KT88 tubes for metal - I have the Rogue Audio M120 monoblocks, $1500-$1800/pair - out of the price range of course, but where I finally settled.
An amp that hasn't been mentioned yet, and should be worth a look is the Conrad Johnson Sonograph SA400: $800-$1000 and 200 (or was it 220?) smooth, sweet watts. Lower power and lower price is the SA250 for around $600 or a little more. They don't come up too often, and sell fairly quickly, but they may be a little more lush than the McCormacks at the same price range. Either CJ or McCormack are good options in the price range, though.
As for B&K, I'd avoid the newer amps (EX-, REF-) and consider one of their older higher-powered amp or pair of monos (M200 I think it was called) If your Thiels have a wicked impedance curve, however, B&K may not be your ticket - some of their amps don't have the grip to handle tricky impedances.
An amp that hasn't been mentioned yet, and should be worth a look is the Conrad Johnson Sonograph SA400: $800-$1000 and 200 (or was it 220?) smooth, sweet watts. Lower power and lower price is the SA250 for around $600 or a little more. They don't come up too often, and sell fairly quickly, but they may be a little more lush than the McCormacks at the same price range. Either CJ or McCormack are good options in the price range, though.
As for B&K, I'd avoid the newer amps (EX-, REF-) and consider one of their older higher-powered amp or pair of monos (M200 I think it was called) If your Thiels have a wicked impedance curve, however, B&K may not be your ticket - some of their amps don't have the grip to handle tricky impedances.