Welcome to the forum, Seth!
"Best" means different things to different people, even if you narrow it down to video quality: color reproduction, black level, off-angle viewing, glare, motion blur, and so on. So, the recommendations that you get are going to be based on people's own preferences.
Where abouts do you live? Costco is a very well known chain of stores in the USA. I ask because it might help us figure out what you can get for the price you want to pay.
If I may, I'd like to give a suggestion. Buying the absolute "best" 37"-42" TV today will cost quite a premium, and in under a year, there will be something better...and probably at a lower price. TV technology is changing quite quickly at this point in time. I would suggest that you think through the cost/benefit of this thing. For example, if you spend $800 on a good TV instead of $2000 on a great TV, then you now have $1200 left over that you could spend in two years on another TV that will likely be better than the $2000 one is right now. Just my thoughts on it.