MQA, from a technical standpoint, may or may not be your cup of tea. In theory though, things marked MQA have a better mastering pedigree, so whether you listen to them with or without an MQA DAC, you may still get a benefit. Given the 500K titles lost in the MQA fire, your mileage may vary.
As others noted, Qoboz has high res without MQA requirement and so does AmazonHD but your playback path options are pretty limited.
