I recently cut the cord on cable and made a big decision in which TV to buy.
For me my top priorities:
Quality for HD:sports,movies, etc
Smart Apps:HBOGO, Amazon,Netflix,etc
Functionality for other devices: AppleTV,Internal Wifi
I have been a true Samsung TV buyer for years but opened my horizons to other during my search but still came back to a Samsung LED as they do it best imo.
I stream XBMC to AppleTV through Airplay and it works flawlessly and even get HD on some apps on XBMC.
The HD quality is great through my Mohu antenna and even better HD quality as its uncompressed from when I had DirecTV.
AVS forum is a great place to get honest reviews and tech info. I honestly would say dont bother with the Best Buy displays as they jack up all the settings but go to get an idea of size and depth of the screen. I was lucky as my friends had different TVs and used their brands as examples.
I wish ya luck as this is a big purchase for a man.