I recently replaced my DirectStream MKI - heavily modded - with a Weiss DAC 501 MKII. I cannot respond to the SQ of the DS MKII, but I believe the Weiss DAC is much more neutral and noise-free. Also the build quality is much better.
Also the Weiss DAC 501MKII has an excellent Ethernet input and the DirectStream MKII does not.
I did not listen to the Bricasti Model 1 Series II DAC - but it is also much costlier than the PS Audio or Weiss.
Please be aware the Weiss DAC requires plenty of burn-in time and a very musical power cable.