Well, I own the AM Tubadour III. I did not get the SE model however did get the capacitor/ resistor and USB power supply upgrades. Cost was $1900. The stock version is $1500 and can be upgraded at a later date. Love this DAC.
I can't comment on these. I have the MHDT Orchid and I love it. What I will say is that based on what I've read and heard, you (OP) have compiled an excellent and selective list. Well done!
I can't comment on the models you mentioned, as I have not heard them in any setting. But I will say, never but never buy a DAC that is not 32 bit / 384KHz compatible, has a Femto Clock with very low jitter, and can handle any format shoved into it. The reason is if you get something other than the above, it will become obsolete in a few years and all that cash you spent becomes, well, "so yesterday". Trust me; been there, done that, got the T-shirt!
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.