The 105 won't output the full SACD resolution over SPDIF digital due to copyright issues. You could either get a Vanity board for the Oppo or use the analogue input for that.

Also you can't get multi-channel hirez from a Bluray into the G61 as single SPDIF doesn't have the bandwidth. This would require an HD621 and multichannel input, but the core audio ought to work fine.

Trifield will be fine, since this is done entirely in the Meridian.

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.