Which 40 in TV LED should i buy during 2012?

The 40 inch LED TV is advisable for a min viewing distance: 5 feet and max viewing distance: 10 feet. You can visit  LED TV Buying Guide for find the best TV LED for you.

Samsung  2012 Models 

List of all models  Samsung TV LED for 2012

• Samsung 40 "LED EH5000 (60hz, CMR 120.2 hdmi)
• Samsung 40 "LED EH6000 (120hz, hdmi 240.2 CMR)
• Samsung UE40ES6100  (120hz, CMR 240, slim .5 "bezel, internet, built-in wifi, web browser)
• Samsung UE40ES6710
• Samsung UE40ES7000
• Samsung 40 "LED ES6580 (120hz, CMR 480.3 D, internet, web browser)
• Samsung UE40ES6800
• Samsung UE40ES8000

Models 2011:

• Samsung UE40D5003
• Samsung UE40D5000
• Samsung UE40D6000
• Samsung UE40D6100
• Samsung UE40D6510
• Samsung UE40D6530
• Samsung UE40D8000

Sony 40 "on sale during 2012:

List of  all models Sony TV LED for 2012

• Sony KDL-40EX640  (120hz, bravia engine 3, Motionflow xr240, wifi adapter included, web browser)
• Sony KDL-40HX750  (240Hz, 3D, built-in wifi, web browser, Motionflow XR480)
• Sony KDL-40HX720
• Sony KDL-40HX850  (Monolithic, 3D, built-in wifi, web browser, Motionflow xr960)

Models 2011:

• Sony 40EX523
• Sony 40EX521
• Sony KDL 40EX520

LG 42 "for sale during 2012:

List of all models  LG TV LED for 2012

Models 2012:

• LG 42LM6700  (120hz, local dimming, 3D, internet)
• LG 42LM8600
• LG 42LM9600 (480Hz, full array, 3D Internet, dual core processor)

Models 2011:

• LG42LV3550
• LG42LV4500

Panasonic 42 "for sale during 2012:

List of all models  Panasonic TV LED for 2012

• Panasonic TX-L42DT50  (240Hz, 3D)