Panasonic VT65 in 50" 55" and 65"
Panasonic ZT65 60" (bought last week at £2400 down from £3800) best tv ive seen though the VT range will do you for games.
Sony W905 led tvs, very low input lag, even slightly lower than the above panasonics and a good price now, though imo for overall picture quality, and a screen with very little problems, the panasonics are the winner, but just for games, these sony w9's at current prices
46" £899 john lewis
55" currys £1250
Both were double that price 6 month back.
You cant go wrong with any of the above, though the 60" ZT is the best screen on the planet imo for overall picture quality.