I appreciate the input and the heads-up about the caps. They are fairly recently replaced though, so I should be good for many years to come.
One thing that really strikes is the depth and height this amp can re-produce. The Krell was more forward (to be expected) and extremely detailed, kind of calling attention to all the details. The ML is kind of just "there", you hear all the details, but more in appropriate "space". I used the word calm before to describe it and that's very much what it feels like listening to it.
Before the music was played in front of the speakers (and yes, the speakers disappeared) and now it's more behind the speakers (and you still can't pinpoint the sound source).
The combination of the Thiel CS2.4's and the Mark Levinson 334 is very, very special. Yes, I've heard better, but that was with the McIntosh MC1.2kW mono blocks, so many magnitudes dearer.... still the 334 is not that far behind in my room and at my volumes (larger room and louder might be a different story, but I would give you way before the amp will...)