how good are the non os dacs?

so, thus far you guys are very happy with the non os dacs. that is a good recommendation towards that direction. can anybody check out the promitheus website and tell me if technically this dac looks sound. saving 500.00 vs the audio note sounds good to my wife and the checking account. thanks.

muralman,
as i am no engineer, what seems to be the concern in the design of the dac. i respect your hesitation and would like to hear what you think is a problem.

mr tennis,
i was very specific in the dac i was most interested in if you want to comment on that one or any of the three you own. the adjectives used indicate that the listener enjoys the presentation and i believe that is what this is all about.

thanks for the responses so far, i am getting a great impression of pros to this design and the limits of its capability. mr. tennis, since you own the one i want, how pleased are you with it and do you feel it was a good investment? nill the pill, which one do you have? thanks again for the input

ok,so i have spent some time listening to a buddy's higher end system and liked his digital sound. came back to mine with a known cd and noticed that mine does many things well. however, i was able to pinpoint what annoys me about the sound. distortion in dynamic passages, especially in the upper treble. mine sounds good until there is strong burst of dynamic energy. so is this the fault of the power supply, op amps or what. in addition what dac/player do you guys recommend under 600.00 that can combine smoothness and handle these dynamic passages. thanks again

well, i thought i would update this thread that i started. i borrowed a well regarded non os dac that had obviously better bass and dynamics than mine but i never heard anything that really wooed me into enjoying it. then i got back on the internet and researched until i had headaches, dizziness, and a pissed off wife. so, i finally decided to just try something on a whim, i won an adcom gda600 dac off of ebay with a well regarded chipset and dual power supplies. it sounds great, very natural and unforced. piano sounds phenomenal and it has a magic to it that i have not heard in my home in years. so i am pleased. the digital fatigue that was subtle but driving me nuts is gone, hooray. thanks for the input.

kschiu,
i ran across the 1541a chipset in my research and with the correct implementation it is regarded as one of the best ever, so it might be worth a revisit. obviously, what the rest of your system contributes to your sonic picture matters a great deal i.e. metal vs. soft dome tweeters, tube vs solid state amp