I have the T+A DAC 200 in my system now on a trial basis. I am also trying the PS Audio DirectStream Mk2. I own the Bricasti M3, been using it for more than a year. In my system the T+A and M3 are similar, with a slight edge to the T+A in terms of detail.
The DS Mk2 on the other hand is more refined than either: smoother but with more micro-dynamics, resulting in better textures, detail, and separation of instruments; definitely more soundstage depth than the others; a larger soundstage; better definition in low frequencies.
I am not using the preamp feature in any of these. Unless things change dramatically I will be going with the PS Audio unit. I will say that the build quality on both the Bricasti and T+A is stellar.