4K is basically a scam.
http://www.cnet.com/news/why-4k-tvs-are-stupid/ and
http://www.cnet.com/news/why-ultra-h...-still-stupid/
Essentially unless you're buying an 80 inch 4k TV and sitting less than 10 feet away from it it's a waste of money. If you are doing that, great, but that's not most people.
On the whole, it's a pretty bad time to buy a TV right now, unless you're willing to go OLED. And even then, if you wait, the price will come down.
The other option is to see if anywhere still has a Panasonic VT50, VT60 or a Samsung F8500, which aside from the OLEDs are still the best TVs out there for picture quality.
EDIT: here you go, under 2000 bucks, best TV you're likely to find for anything resembling that price.
http://www.2001audiovideo.com/en/cat...sung-PN60F8500