hello. just an fyi, robert r likes or at the very least uses the three eye monsters (one for the ribbons and another for the woofers) in a bi-amp application with active crossovers to drive the the three silvers. that is what i listened to at the fest rooming with him and mike in the three floor cabin. very nice effect those have in three channel mode. for me personally, i like the tfm55's in mono to drive the original al-III's. hell, even one in stereo mode is more than enough to put a big smile on my face. when we listened to the tube silver's at the fest, i was amazed that they did infact sound smooth and did have a simular sonic signature to the ss amps that i own. the silvers were accurate and did not at all make me think that the tubes lacked in bass or treble at all. they sounded like the best amps i have ever heard personally. the sunfire amps were also very nice, but the one that kinda stole the show was the lightstar amps that were there. i spent the maority of my time listening to them with the new amazing's that james made. so in the order of oh my, carver tfm55, sunfire 300/per, sunfire 600/per, lightstar mkII, lightstar cyclops and the one and only silver tube amps. of course the money goes up with the model as well, funny how that worked out as well.