Rich; organic true balanced amp w good detail $6k

I have and really like VTL 450s from a few years back (no autobias and different caps than before). I think they are great. However, if you have high-efficiency Coincidents, the 450s might be a bit of overkill (like they are with my speakers). The Coincidents are reasonably benign loads as well so I think you could get away with less "beef."

Another couple of amps I can toss in the mix if you can find them used would be EAR 890(s) or EAR 861(s). They are both stereo amps which can be bridged and used as monoblocks. The 890 uses a KT90 tube and the 861 uses a EL519 tube (originally a TV set tube) in "enhanced triode mode". Both amps (and almost all EAR amps) have quite beefy transformers. They both have true balanced inputs, both work in Class A, both are quite easy on their respective tubes (the EL519 has a VERY long life) and both amps are very easy on the user (autobiasing, very little to do, long tube life).

If it were my choice, I might go for a PAIR of EAR 861s (which, when bridged, would put out 64W per channel). They have no feedback, are extremely linear, and I find the midrange and highs to be absolutely wonderful with this tube and depending on which Coincidents you have, you might be able to get by with a single amp just fine (the 890 would be no problem as one amp is 70Wx2). If you found them used, they would probably be in the price range for two (ditto for one 890). And in any case, you could get one, use it, and if you decided you needed a bit more oomph later, you could get a second. I love the tube...

Manley makes sweet sounding amps that can be run in triode or tetrode modes. I would say with your set up triode would be what you're looking for. A lot of amp for the money.

Jmcg- yes, re: the Pass, I don't believe the XA-60 is balanced, but I could be wrong- I only know the newer XA-30.5 is. Belles MB-01? Hmmm- any writeups on this one? As for the VTL 450- I am sure the newer version would be mucho denaro $$$! You had Claytons? cool- it sounds like the new M-200's would fit all parameters except for cost ($9,500 new). One amp everyone seems to agree on though are the Lamms.

Rleff- have never heard Moscode- is it also a true balanced design? Do they have lower powerered versions, and how would you describe their sonic signature?

T_bone- EAR- yes! Have heard some great stuff about that guy's products. I will have to see if they have a Canadian dealer somwhere- would really like to give them a listen- would the 861's be the sweeter-sounding of the two? (compared to the 890)

Apache- yes, Manley was mentioned earlier- good thought, but am not sure if they run balanced, and how hard they are on tubes, in fact not even sure which are their best models.

Sutts;
I listened to the 401HR on my friends soundlab a3's and was very impressed.Moscode is a tube hybrid rated at 200 watts per channel;listening to the A3's there was a large soundstage,excellant bass control and the strings seemed just natural to me (proper timbre I guess).
I have soundlab m2's and was going to buy one of these myself except I decided to try the OTL experience;if I was going another direction the Moscode would be on my short list.Moscode website is www.moscode.com;the only spec that it does not meet as you listed is it does not have balanced inputs.

Personally, I would choose the 861 (or the pair). I own an 859, which uses the same tube (also has beefy transformers, ETM output, sounds so silky smooth it is ridiculous, alas has only 13.5 watts and I need more) and I love it. The 861 is basically a larger ('push-pull') version of the 859. They both sound wonderful. The 869 (1-2 watts more than the 859 but otherwise almost identical) is also good.

I happen to like Tim de P's circuits. He doesn't use feedback much, he likes trying to get SET 'taste' with more power and is willing to experiment with circuits to get there.