You really need to go look at a set to decide. Try to find a higher quality dealer who can show the set to its best. However, if you are stuck with Best Buy, ask the salesman to let you play with the remote and go in and use the video mode to your advantage. This set should have a THX setting, which will be close. If not, try 'cinema' or some similar name. All TVs in the store are set to a 'vivid' (torch) mode by default so the POP next to the others. This setting has high brightness, contrast and color saturation. It pops in the store, but is tiring at home and nowhere near the best possible image.
I can't tell you if the Samsung is right for you. Nobody can but yourself. FWIW, I own a 2017 Samsung 9000 series 65" set, which is the direct ancestor, and I am quite happy with picture.
I'm going to be frank here, and many will disagree. Having an ISF calibration done will provide a picture that is strikingly better than you can achieve with the normal controls. However there is the matter that this sort of calibration costs a significant fraction of the price of the TV. You can achieve results that are much better than the factory presets with a calibration disc and a lot of patience. Is it as good? No, but all it costs is $40 for the disc and a few hours of your time. Not to mention that the ISF cal should be repeated every couple of years.