I just want to update my situation. I am using the Valahalla amp for my main speakers, Spatial Audio Lab X5s. I went to Pacific Audio Fest and met the Spatial Audio Lab gang who are also making the Valhalla amp. Also Don Sachs who built the Valhalla amp (and has taught Cloud Sessions at Spatial Audio Lab to build them) and Lynn Olson whose design Don used. Don and Lynn are building a 300b monoblock piece de resistance which is the main topic of the 300b thread. I got to hear a prototype along with Cloud Sessions' improved Valhalla amp as well as Spatial Audio Lab's new speakers.
Anyhow, I originally got the Valhalla to drive the Nola Boxers but it was better than the LTA and so the LTA went to drive the Boxers. I changed the set up (furniture) and the LTA unfortunately no longer fit inside the furniture as it was about an inch too wide. I had a Nakamichi TA-4A which had been recapped and sounded good so I used that as a placeholder.
Carl Marchisotto, the guy who is behind the Nola speakers (and I also said hello to at the Pacific Audio Fest) had emailed me saying that the Boxers were meant to be played with KT88 tubes (the Valhalla uses K66 tubes and the LTA uses EL34s or KT77s) and his customers had found synergy with the Cayin CS-88A integrated tube amp. I finally found one used for sale on the Canuck Audio Mart (I've found some nice stuff there including the Boxers at less than 1/2 price as well as PS Audio's phono stage at about 1/2 price). Just came in today and yes there is synergy and a very rich sound. Heavy sucker bot it fits the space and really works well with the speakers. I had some things to deal with in terms of inputs and the right channel not working until I made sure the tubes were all pushed in but it sounds exactly what I knew these speakers could do. Yay!