Variability of posts on this thread point to the complexity of streaming, so many paths to quality sound. I agree, don't worry about MQA, plenty of high quality streams available without it.
Its been my experience streamer is most important component in streaming chain, this followed by dac, then network. I consider streamer and dac combo analogous to amp/speaker as far as integration concerned. You want streamer's most optimal out/rendering port to match with dac's optimal in port, ie, if usb is streamer optimal port, usb should be dac's optimal input. This info can be found in manufacture literature and reviews, generally looking for optimal clocking and noise reduction on both streamer and dac ports.
What constitutes a streamer nowadays can be very confusing. Basically, a streamer stores music player library, processes music player software and renders an output to dac. Some streamers add things like on board storage for local files, dacs, preamp. Streamers can also be used as servers only, in this case a second streamer is added, first streamer only stores music player library, process music player software, second streamer does the rendering.
Determining best streamer for one's need is wholly subjective, for instance, if one doesn't have large collection of cds for ripping, local storage superfluous. same goes for dac and preamp capabilities.