You didn't like the sound of krell because you never heard it with the right preamp. I couldn't even listen to my krell amp with solid state preamps, at least the ones in my price range, but with a tube preamp it sounds great.
I have to admit I have only heard full Krell stacks, and that this could very well be possible.
I have heard other tube pre/ss amp combos which were stellar, especially with ESL speakers.