Dr John,
Try Qobuz, even on a laptop feeding a DAC via USB should be decent enough. You can chase improvements by throwing a lot of money at the problem, and you should see some minor benefits. A very good CD player is going to sound more musically complete and satisfying in my experience. I do stream music because it is so convenient, and the results can be very good indeed. Comparing albums streamed with same albums on my CD player sounds more complete on CD though.