You may want to consider Decware instead of the above. I admit I haven't heard the Schitt gear you mention, but I have heard the PrimaLuna and many other amps in my system as I am a dealer (was a PrimaLuna dealer and had that unit). The Decware (and I am NOT a dealer for him) by and large fried all the competition. I have his Zen triode SET amp (SE341.5) modified with Jupiter Beeswax caps and have it bridged to mono which give 12W Class A per channel. His power supplies are huge, and the amps sound like they are on batteries. I am driving Quad 57's with them-not your most efficient speaker-and they do all the volume I need, with delicacy, huge soundstage, depth through the wall, and tight bottom end. Admittedly subs handle 60Hz on down. Everyone that has heard them will or are going to buy some of his products. They are dirt cheap for the performance. I also got the OTL tube preamp w the same caps, and I spent all in $6400 with shipping. My previous setup I had 3 times that invested and the Decware beat it.
Good Luck on your search.
Good Luck on your search.