OPPO Sonica DAC to Lumin D2 Upgrade


I’m considering an upgrade from an OPPO Sonica DAC to a Lumin D2.  I’m generally satisfied with the OPPO sound and appreciate its simplicity of use (there is little doubt that it’s an absolute bargain at its price point).   

However, I briefly owned an Aurender A10 and found that it provided marginally better sound over the OPPO at a significantly higher cost.  Its only benefit, in addition to Aurender’s decent user app, was it’s on-board storage which was of little benefit to me.  So once again I’m considering an upgrade-this time at a more affordable level.   I prefer a unit that has similar functionality to the Sonica DAC.  

My basic question is this:  how much of a sonic improvement might I expect going from the Sonica DAC to the D2?  Also, how good is Lumin’s user app when used with Tidal streaming?  My OPPO was $799, the D2 lists for $2300.    The streamer/Dac (w/Tidal) will function as my sole source feeding a Belles Aria integrated and PMC twenty5.22 speakers.  I’ve found the Aria/PMC combo to be wonderfully satisfying and they will not be subject to change for the foreseeable future.  Any thoughtful advice will be much appreciated.
jreale
Jackd, thanks for adding the Teac recommendation.  No doubt, the functionality of use as a separate Dac is certainly an added benefit.  Your opinion on the sonic differences between the Teac and Lumin units is is exactly the the kind of info I was looking for.
Glad to help. They are both great units and I agree with the description of the Wolfson based Lumin's as being the streamer for the Vinyl first guy.  The Teac just gives you a little more in terms of performance and functionality. 
Trade Sonica to Oppo 205. Then you can stream Tidal MQA using 205 MQA decoder. You would get 192/24 or 176/24 from Oppo. The oppo Oppo runs at black market for $2500 (doubled from origingal $1200 MSRP)
Only the truly gullible, naïve or just plain desperate would pay $2500 for an out of production Oppo 205 which sold for just $1200 prior to being discontinued!
They were a great buy possibly at $1200 but no way are they worth $2500!
I have what I think is a similarly budgeted and sounding system as the OP ... Schiit Gungnir Multibit --> Belles Aria Integrated --> ATC SCM11's. Likewise, I am very very happy with the Aria/speaker combination (though think about SCM19's) and was also recently entertaining a similar upgrade of my DAC to a pricier integrated network streamer/endpoint/DAC. Options again mainly being the Lumin D2, Teac NT-505, etc. But what I did in the end was to add an Allo Digione Signature endpoint + LPS in front of the Schiit DAC. Full Roon/Tidal/everything and superb clean sound that will likely beat any of the integrated network streamer/dac's being suggested. Yeah I know products like Allo are anathema to many on this forum but the digital parts of Lumin, Aurender are massively overpriced imo. I would prefer to put my $ into the analog side of things.