Need DAC comparable to OPPO BDP-83SE, or better, small size, USB OK, SPDIF coax...

Remodeling our RV so I can fit, after rebuilding to new shape woofer section of Edgarhorn Slimlines. Bringing my old system out of storage after many years, highly upgraded Baby Sophia tube amp. High powered big subwoofer system design underway as well. Oppo just to big to use it so need to work out a mini computer with BD player for our limited collection and will be using Qobuz for most all music. Looking into an PRi or mini computer and slim external BD player. I need some sort of switcher as well as have the TV swivel down from ceiling and a Martin Logan Vision X sound bar above it for more casual listening. CHEAP but great, I know not impossible to find but needs to match up well with the Baby Sophia and upgraded Slimlines. Thanks, Rick (Wife and doggy waiting for me, I will refine this post when I return:)