Separate DAC or continue using the Oppo UDP-205


Hello,

  I have all my music on a hard drive in FLAC.
I am a using Sonos Connect, Optically connected to the Oppo. From the Oppo (RCA'S out) to a Primaluna Dialogue     Preamp. The Amps are 2 Primaluna HP's. Martin Logan Theos speakers. I have rolled mostly all the tubes, and absolutely love the sound. Family and friends also love the sound.

 My question is, Should I continue going through the Oppo, or should I get a separate DAC? Nothing to crazy in price.
I have seen these things go for thousands, and thats fine if you can swing it. I was thinking around a $1000.
But, would it change the sound or would it pretty much be the same? In other words, is the Oppo that good at what it does?

 Since we are always tweaking our systems to make them sound better, I thought I would ask all of you first, before calling the salesman. I also have thought about  getting a turntable. But I gave away all my albums many years ago.
Buying a turntable, buying albums, taking care of all that stuff. Not really what I had in mind. I would like to keep it fun, and simple.

  Thanks
loganfan
 I think its great that we can post a question and get so many different opinions, but while I read all these answers I have to make a decision.

 So, I got another Hard drive. I formatted it to work directly with the Oppo, eliminating the Sonos. Now I can just switch the Oppo from Optical to USB and compare the sound. If I hear a difference I will let all of you know, I am sure I will.
Then I can see what direction I can go. I really thank all of you for your suggestions, and of course let you know what way I go. As I said in the beginning, I was happy with the sound, but always like to tinker. Especially if it doesn't cost a lot money.

 By the way, I would never sell the Oppo, It does an incredible job with DVD'S.

Andy

tweak1,
Are you saying that your friend's hard drive version of the same recordings on CD sound superior to the CD?  In what way?
The OPPO 205 functions - via USB and wifi - as a full Roon endpoint (rendering and decoding). wifi works flawlessly, if you have a good home wifi system (Linksys Velop, Google mesh, ...). If you replace the SONOS with a Roon Nucleus (or download Roon on a MacBook), you should be able to consolidate all your sources (stored and streamed) - except Spotify - on one very powerful streamer platform (Roon) with excellent user interface and use the OPPO as DAC.
If desired, Roon supports multi-room functionality as well.
This configuration supports hi rez and MQA as well.
I have compared the OPPO extensively to a number of other DACs (Mytek, Cambridge 840, DSpeaker X4) and think it is as good as all these very good DACs. When carefully matched for volume, none of my audiophile friends could tell them apart from each other reliably.
 OK, I did some comparisons. Switching from USB to Optical. Optical being the Sonos, USB is the hard drive straight into the Oppo.

 I give a slight edge to the USB. But not a crazy difference. I also notice that where I used to put the volume knob, the music is much louder. 

 Thanks for all the help
 Andy
I agree with Sonicjoy.

You need to start streaming with a Bluesound or a Bel Canto streamer to take advantage of hi res music from TIDAL or QOBUZ.  

You might want to take a look at the Pro-Ject S2 DAC retailing for $400.

Here is a review to watch:   https://www.youtube.com/watch?v=_3RUADt81x8