I see your dilemma. So do you have to loose a box? You have some fantastic speakers. If I were to work from there I might start with a streamer only. Aurender, with out a DAC. Given the quality of speakers and amp you would like to stay at that level. I guess more info on you constrains would help.
I think ideally you would implement a separate streamer and DAC, using your preamp as a preamp.