Posting from my phone, so please pardon any irregularities in the format. MicroCenter has this TV on sale for $599, but unfortunately in-store only, so appeal is probably going to be limited. I couldn't find much on this TV with the exception of Best Buy, which appears to carry the same model number (possible price-match?) for $799. Out of 27 reviews, looks like around 4 stars. I dont recall seeing any 4K TVs in this size class for a price this low so thought I would post it.
While I can't speak personally for the brand, my inlaws bought a 42" Westinghouse a few years ago and it is still chugging along. No HDR on this model it looks like, and MicroCenter's own listing offers conflicting info on refresh rate, 60 vs 120hz, but the main description says 120hz, so who knows for certain...might go check one out myself. :-/