Not sure about price; given my current TV has lasted me since 2012 I think I get my value out of them so not too stressed about price. Been looking at the LG 43UN81006LB. Gets good reviews.
It's definitely one of the better ones in that price range. It's direct lit LED rather than edge lit which is better for black levels and imo, WebOS is the best TV software for useability.
Massively depends on budget.
I would look at panel type, backlighting tech as well as software. I'd try to avoid Android as the base software where possible.
If you can, also try to avoid side lit or minimum dimming zone TVs at the lower end of the price brackets.