Michael

We still have our Roku Streambar Pro. It takes up less space, was cheaper than a full blown HT system, and sounds perfectly fine. We added rear speakers and the 10-inch Wireless Bass Pro subwoofer. I don't need anything more than that. Most movies do not even used Dolby Atmos to its full potential. We mainly buy Blu-rays and I'd argue that lossless audio is kind of a gimmick. The only thing you're getting that isn't in Dolby Digital is added channels (6.1 or 7.1, Atmos/DTS:X (directional audio)). They had to use the extra disc space for something.

We just hooked up a couple of large 20TB HDDs onto an extra desktop computer we keep in the basement. I ran network cabling to it and we can remote to it off of our main desktop computer or phones. Run Linux Mint on it with Emby, serve all my movie files and music off of it. It's also backup for all our pictures and other stuff. You don't need an expensive fancy NAS setup. You just need to replace HDDs about every 5-7 years.

There is no reason to use lossless audio for listening. 320kbps is totally fine, even with old codecs like MP3. AAC, Ogg Vorbis and now Opus are all more efficient so you can go to lower rates with the same sound. But I'd still say use 320. It uses less space and sounds the same.