4 k tv help

Hi everyone, firstly i hope i didn't put this in the wrong section, but couldn't figure out where to put it.

I want to buy a 4k tv for my lounge room/office, but i don't really have a clue about tvs, as much as is like to think i do. so instead of blowing lots of money, i was wondering if any one here could help me with a choice.

my parameters are 50 inchs and up, not over 2000$ aus dollars and optionally ,a smart tv ,has vga connection it will be connected  to my computer(or dvi but hdmi is ok i guess) i don't care about audio quality i have amazing surround sound speakers already.

 

Thanks guys for the help.

Seiki seem to have a good line in affordable high quality 4k TVs.