This is a very tough question, but you do have SE loudspeakers and you do state "highest possible quality".
The simple answer is an 818v3 into your G65, but you do not get the most out of either the 818 or the SE speakers with this architecture. The best possible result (excluding any need for room correction) is an 818v3 direct into two of your SEs.
First, can you rule an 818v3 in or out?
Second, is your requirement actually: "I would like to stream music in the highest possible quality through my G65 to all three speakers"?
Roon Developer and ex-moderator of this Forum I am #25 in the HH1 photo of fame.
Although I'm a Roon developer, I'm not au fait with your QNAP model, so I'm not going to recommend anything there.
If *I* was to go with Roon with your kit and budget, then I'd probably get an MS200 and stream to that given that the G65 is 96k limited anyway. You then get the choice of up-sampling in Roon, the MS200, or the G65. Plus MQA decoding is coming to Roon.
Roon Developer and ex-moderator of this Forum I am #25 in the HH1 photo of fame.
Although I'm a Roon developer, I'm not au fait with your QNAP model, so I'm not going to recommend anything there.
If *I* was to go with Roon with your kit and budget, then I'd probably get an MS200 and stream to that given that the G65 is 96k limited anyway. You then get the choice of up-sampling in Roon, the MS200, or the G65. Plus MQA decoding is coming to Roon.
Don't buy anything till you can afford decent/matched front end. You got great speakers, don't waste your money with a small incremental update. Save it for later or spend it on the baby. You may find that when baby comes along, you will reassess your music requirements and you have money tied up in great kit doing nothing.
Meridian owner since 1992 Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).