I've been a Roku user for years and highly recommend it to my friends and family. I purchased a new 65" TCL Roku TV on Thanksgiving for my living room and it really is the best of both worlds. If you're going to buy a new TV I recommend going with TCL. I'm so impressed with their quality that I'm actually thinking of buying another one for my office.
I will admit though that I spent the better part of a year researching TCL before I bought a new TV and I do recommend researching a bit before buying based on your needs. I also recommend buying a sound bar with the TV because the newer TV's are so thin that the built in speakers aren't as wide as some of the bulky TV's. I bought one with the TV. Basically feel like I have a mini theater now. Knows more and more TV makers are signing up with Roku, but as someone who never purchased a TCL TV before, it's pretty much the best TV I've seen in terms of picture quality and smoothness. Even though I got the 65" the TV isn't bulky and set up took less than a half hour.
The only downside was the Roku servers were down on Thanksgiving night so I had to wait until the early morning on black Friday to get the TV activated, but once the outage was lifted it was smooth. Good luck.