I've always been a go hard for Samsung, but my latest Samsung TV is not the greatest and I feel my older Panasonic is still to this day significantly better than my Samsung. At a 3k price point though, you are going to be able to get a really nice TV, but honestly, I don't think I'd spend more than $1k anymore. (My 60 inch Panasonic was $1200 about 5 years ago).
Also, for 4k and video gaming you are going to want to make sure the TV has HDR specs. I don't know much about this since I haven't been on the market for a 4k TV, but I understand if you get a cheaper TV it might not be the best for gaming because of the HDR.