Yeah, I went two years with parts of my system in storage as we were downsizing and building the home we're in now....it just wasn't practical so I got into computer/upscale headphones/headphone amp etc....with my CDs in storage, the majority of my music was itune mp3 files.
When I got this system set up, got my "real" music out of storage...I started back doing what I always did with the Oppo 205, spinning.
The good with the Mp3 files...they easily stream via wifi in my house. For the whole house music, I have no problem with any of them really. But on the main system I feel like I'm cheating myself if I play my itune version of Kind Of Blue, when I have the SACD, so I rarely ever play the computer files on the main system....even the bit for bit CD rip...I still spin.
Once my new streaming setup (should be able to stream my hi res, multi-ch library) is up and running maybe that will change, but whether I can tell all of them or not, I admit feeling Mp3s are beneath my main system...