What is the current perfect entertainment setup? Modern Home/Living Room Entertainment Setup Trends? HTPC, SHIELD, PLEX, KODI?

Hooked up my laptop to my TV and am enjoying the experience. Started looking into HTPC's, found that I am 4+++ years behind the times and most people recommend Shields and Plex (cost savings, easy setup and less tinkering and upkeep for surround and 4k). I am upgrading to 4K TV’s soon. I have an Android TV box (Beelink) with KODI in both the bedroom and Living Room but find them lacking. Could be the remote/keyboard I use (Rii Mini i8). That and it feels like my KODI addons are always dying/not working. The upkeep is becoming not worth the savings. Use my PS4 for gaming but am planning to build and switch to PC gaming. I probably already have my answer but want to make sure before I spend a bunch of time/money and find out I there is something better. So do I build a power house gaming pc, use it as a plex server, buy 2 Shields or build 2 HTPC’s and call it a day. If not what is better? I don’t like to waste money but will spend extra where it is needed. TIA for any answers.