I'm an old retiree living in the dark ages with a Yamaha RX-V1 doing everything in my 5.1 home theater. I'm getting ready to update some of my system with a new smart hdtv but will be retaining my power hungry speakers. As my receiver has a beast of an amplifier in it, I was thinking of going with a newer Yamaha receiver and use it as a pre-pro. Lots of used ones on both ebay and CL but I don't have a clue as to which model will serve my needs. I'd like to get a model that can handle the latest video formats even though I'm not going to spring for a 4K hdtv. Fwiw - I am partial to Yamaha but not locked in concrete as I really don't have a clue as to what would work best with my RX-V1. Help please and thanks in advance.