If you are comfortable streaming from your mac I wouldn't bother with charging it but you might change your DAC. What are you using now as some do a better job filtering from a computer. One I would recommend is the Benchmark DAC 3B if you don't need volume control but the one you have might be perfectly fine. To get a better understanding of what's going on in your room I would download REW (freeware) and get a Umik-1 for $100 and take measurements. Addressing room and speaker interaction and using EQ to fix problems or change the sound more to your liking is the way to go about it not changing DACs.
Matching streamer/DAC combination to SQ of my system.
My question may be unanswerable in a meaningful way. I guess what I'm asking is: what would you (who are more experienced than I am) plan to do in my shoes?
I have a nice older amp--a Musical Fidelity A308, once the flagship of their line--and ATC SCM 40 v2 speakers. The weak links in my system are a relatively low-end DAC and the fact that I stream from a Mac. Generally, I don't have a partIcularly warm sound in a complex listening room.
So if I wanted to buy a streamer/dac unit, what price range would do my amp and speakers justice? What would represent overkill, or not enough improvement to be worth upgrading? For that matter, what specific units would anyone recommend? My budget is limited by my common sense, not my bank account.