I'm not sure if this thread has discussed source synergy yet (I don't have the stamina to re-read it). The EMM DV2 doesn't have an internal source, whereas the Tambaqui does have an internal Roon streaming board.
The obvious streaming source for the DV2 would be the EMM NS1 streamer, connected via EMM's proprietary Optilink (which supposedly minimizes jitter). I do have an NS1 on the way, but I don't have an EMM Dac to try out that particular combination.
For streaming, the Roon board in the Tambaqui sounds good (better to my ears than the separate $3000 streamer I had on hand). Since Bruno Putzeys is/was connected to both Mola Mola and Grimm, a lot of folks pair the Tambaqui with the Grimm MU1 server (Roon core + endpoint + reclocker + upsampler). The Grimm is a special piece. I've had it at home and will try it again. But of course it's nearly the same price as the Tambaqui itself. For me at least, it's one of those money-no-object kind of components -- something for a very ambitious system.