Omegaman, I have used other tube amps in the past, e.g. ASL Hurricanes, Joule VZN-100, Berning ZH-270, and a Canary, but when I got the Andras, I was trying to mate them with the "right" solid state amp. Nothing pleased (a BAT VK-500 came close though) but then I borrowed a friend's Dodd's, and I ended up buying a new pair, they were so good. I've listened to other's Andras being run by Viva and Art Audio low powered amps (25 wpc), and they sound extremely good, but not enough power for me and my bigger room. BTW, There's much more on Audio Circle re: Dodds than here.
F1a, yes I love to tube roll, at least until that "magic" combination is found. In the Dodd amps, I love the inexpensive SED "Winged C" EL34 power tubes, GE 7044 driver tubes, and Amperex 7119 input tubes. In the Dodd preamp, I have found favor in Amperex Bugle Boy 6DJ8s or white label US made PQ 6922. I have a few more to try, but haven't been in a hurry since this combination is highly musical and enjoyable!