IMHO, NOS dacs with Philips converters (TDA 1541A, 1543) are for my taste the best dac for someone is searching for an analog, liquid, natural, full bodied sound withoud bias and artificial sound. It does not mean that NOS dac experience a toning down treeble. It means that with selected and good quality electronic componants (capacitors, resistors, quartz oscillators...), with minimal diagram circuits which minimize the number of componants and integrated circuits and exclude oversampling or upsampling, with fine transformer and supply, we can have a grainless and pure sound with marvellous quality in tone and large frequency bandwidth. However, the sonic performances depend of the source used to provide numerical data to the Dac. Low jitter source (for me Philips CD pro 2 drive) permit marvellous sound with this kind of DACs.
I have a Valab Dac (8xTDA1543 - receiver Dir 9001) that i am modifying a little and modded Satch Dac used in NOS mode (1x TDA 1541A - receiver Dir 9001).
I have had or tried before Bel Canto Dac 2, Dac 3 (Burr Brown PCM 1792), Stello DA 220 Mk2 with the same drive, Accuphase DP 67, DCS P8i, Primare cd31 (4xBB PCM 1704 K grade) and amongst this source most of them were severely "beaten" by my Satch dac on criteria mentionned above.
Satch DAC and Valab dac are the most musical and performer dac i have ever owned regardless the price. But i am sure that other NOS dacs should work as well as these Dacs or may be better...
I have spent so many years to find the fine player (or DAC) which was able to remind me analog listening i had when i was young. Now i have found again the pleasure (the grail ?) to listen and i do not feel the need to listen my vinyl LP.