Buy a 4k TV. Pretty minimal improvments without it. Especially for the price tag. Same with pro, unless you plan on getting a 4k TV or have a PSVR, there is no need to buy it unless you want to future proof or have a very slightly, sharper image on some first party games and a faster UI experience.
Everything in the above reply is my opinion, from my own perspective and not representative of reality outside of my own head!
-Android user, please be gentle with critique on my spelling.