I have an Innuos Pulse feeding the DA2 in my McIntosh C2700. Also, the Pulse feeds my Aries Certat Helene DAC via USB. The Innuos software is easy to use and extremely reliable.
Regarding sound quality, the DA2 is incredible from a cost/performance ratio. I think it can compete with anything up to $3.5K. However, as others have cautioned, I would not spend a mint on a streamer until you have a DAC commensurate in performance. The sound quality improvement you question will come from a better DAC, not a streamer.