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
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