Sorry for the extended delay on sharing how the PrimaLuna KT88 tubes sound. First we had technical difficulties with the first batch and it took some time for PrimaLuna and EAT to sort out the problem.
Yesterday I received a fresh quad of the tubes. These tubes are amazing. I played them last night for about 4 hours letting the bias settle down, my system has never sounded so good. Everything is better, the bass is controlled, articulate and has great texture. We just moved to Kansas from Dallas Texas 9 months ago and now have a basement, something you will not find in Dallas. I felt my speakers did not have enough room on the sides and were constricted. The PL EAT KT88 tubes go past my side walls 2 feet into the next room.
I played them again tonight and even cold they sound nice. Warmed up they are impressive.
For my troubles PrimaLuna sent a quad of the Tung Sol KT120 tubes. They are huge and nearly the size of a coke can. I believe they will carry these and offer as upgrade tubes in their amps. A nice compromise considering the $1600 price of the EATs.
It did not go as I would have liked but to the end we remained gentlemen and everything worked out for the better.
Thank you all that voted for me that allowed me to win such a wonderful upgrade to my system.