The unit you linked to is an integrated amp with speaker outputs, not strictly a preamp. There are approximately a zillion different ChiFi dac/preamp units that would work in your setup. Which is the next question, you say some amps and speakers, which ones might help in the recommendation. I've bought a few items from the ChiFi market and had very good luck, others had reliability issues. I'd recommend staying with the big players like Topping, SMLS, and Loxie. Ifi and Schitt are well respected American brands that have lower priced lines.
I also wanted one remote for my TV system. I run a two channel setup with an Xfinity Flex, think Roku, remote running the volume, streaming service selection, and on off. I take the optical feed from an LG 4k 65" thru an ancient DAC that sounds great, to a 90s Nakimichi receiver acting as an integrated amp. My Flex remote controls the volume on the Nak, but you could do it from the TV or a Dac preamp with volume control included, something like my Topping D3 DAC.
Sticking with those brands you're mostly looking for connectivity options. You need optical, HDMI might help but not necessary, and maybe a volume control. Then just run your rca connections to the amp.
