I have a ZMA and I love it. I'm trying 7027 A's in it right no, NOS General Electrics from the 60's.
Immediately after I got it from Decware I discovered it came alive when used with a preamp. I bought a Backert Rhumba Extreme and its been pure bliss. The 300B from Decware is very tempting but I have a big room and I don't think 8 watts is enough for my O96's.