I haven't seen the Westinghouse UHD sets...but I HAVE seen their 1080p sets. STAY AWAY. FAR, FAR away! There is a reason these sets sell at the price point they do. They cut corners. They skimp on the scaling hardware (so your 1080p blu-ray discs and plain old cable TV won't look very good), they skimp on things like the power supply (so don't expect longevity from the set)...they skimp on things you will never see, like the capacitors and other electronics used, which also affects picture quality AND longevity.
Can't afford a new Samsung, Sony, LG, or Panasonic UHD set? I would recommend that you live with what you have and save up for a BRAND NAME set before rushing out and grabbing one of these!
It's kind of like cameras. You can find a really cheap 20 megapixel camera that takes worse pictures than a GOOD Canon 14 Megapixel model. If all you care about is that the set has UHD resolution, fine. If you care about the actual PICTURE...move along.