Answer:
I would recommend you
Panasonic TX-P50S10B 50-inch Widescreen Full HD 1080p Plasma TV with Freeview
# 400Hz Sub-field Drive Intelligent Frame Creation Pro
# 2,000,000:1 Dynamic Contrast (Native 30,000:1)
http://www.amazon.co.uk/gp/product/B0020HRIDS?ie=UTF8&tag=tbdbestdeal-y-21&linkCode=as2&camp=1634&creative=19450&creativeASIN=B0020HRIDS
Panasonic TX-P50X10B 50-inch Widescreen HD Ready Plasma TV with Freeview
http://www.amazon.co.uk/gp/product/B001TUYUTC?ie=UTF8&tag=tbdbestdeal-y-21&linkCode=as2&camp=1634&creative=19450&creativeASIN=B001TUYUTC
LG 50PS3000 50-inch Widescreen Full HD 1080p Plasma TV
# HD Ready 1080p (1920 x 1080) Resolution
# Dynamic Contrast Ratio of 2,000,000:1 and Brightness of 1,500cd/m2
# Intelligent Sensor to optimise your picture and reduce power consumption within any environment
# 600Hz with sub-field driving to eliminate motion blur
http://www.amazon.co.uk/gp/product/B001UHMT88?ie=UTF8&tag=tbdbestdeal-y-21&linkCode=as2&camp=1634&creative=19450&creativeASIN=B001UHMT88
{ 4 comments… read them below or add one }
For 50inch 1920 x 1080p is better and good model that I would suggest is Panasonic TX-P50G10B 50-inch Widescreen Full HD 1080p Plasma TV with Freesat
– Dynamic contrast ratio of over 2,000,000:1
– Full HD 1080p, comes with built-in TV tuner and Freesat digital tuner
– Ultra-fast response speed: 0.001 millisecond, ideal for gaming
– Intelligent frame creation pro: 600 Hz sub field drive
http://www.amazon.co.uk/gp/product/B0025WI4FY?ie=UTF8&tag=computer09-21&linkCode=as2&camp=1634&creative=19450&creativeASIN=B0025WI4FY
The highest rated Plasma out there right now would be the Panasonic 50" model number TC-P50V10. It has the best picture quality of any HDTV out and Panasonic HDTVs are among the most reliable!
If the V10 model is too expensive for you, i also highly recommend Panasonic's G10 and S1 models.
If you can track down a Pioneer Kuro, buy one. They have been described as "…the best televisions ever made."
You want the best resolution you can get such as 1080p. Panasonic is a good bet and you will need a HDMI cord if your xbox360 has a HDMI port.