Marshall AVT were my first thought when I read the first post, also consider Laney's Tube Fusion range. If you're interested in a valve amp, then look at the Ashdown Fallen Angel range, multi channel valve amp with a digital DSP on board.
FWIW the Peavey Valve King, being a new amp will get no end of criticism (Marshall JCM2000 range anyone?) the best thing to do with any amp is try before you buy, and let your ears decide what sounds best for you.