I'v purchased some Burson products in the past and so they offered to let me evaluate the Burson Play in its lowest stock form. I naturally took the opportunity as I'm very happy with their opp-amps in my current setups. I initially heard they were a good upgrade to the Xonar Essence STX so I picked up some V5 Dual's and was blown away how it sounded compared to the stock JRC2114. After that I got the XD-05 for portable use that I am happy with using a V5i Dual in it vs the Ti OPA1612 it came with. I also have the 2015 version NFB-11 with USB 32v2...