Sony 40"R452a, goes for about RM1.9k. Lowest input lag for a TV under the RM2k mark, ranging around 25ms which is very, very good.
Quite a good TV across all ranges though — from blacks, to whites, to decent color accuracy.

There are some issues with uniformity, but that's to expect for LCD LED TVs as all of them suffer inbalancing in screen uniformity.
Blacks are pretty good, but can sometimes crush shadow detail a little bit. Whites are usually on a redder tint out of the box, so you'll have to calibrate a little bit but shouldn't be an issue.

Downsides? Motion blur on the R452 is quite subpar. So if you're sensitive to blurring images in fast scenes, you might be irritated.
Viewing angles are also quite poor, so don't expect a wide field of viewing. If you're using this TV for a bedroom, that shouldn't be an issue though.

Finally, if you can step up another RM300-400 in your budget then your choices open up to the better Sony W674, Panasonic E6 and Samsung E5500.

My settings for a bedroom:

Game Mode
Backlight: 6 or 7 (6 if I turn off all the lights)
Contrast: 93
Brightness: 49
Color temp: Warm 1
Sharpness: 50
Gamma: -1

White Balance
All default except blue gain at -2, this is to account for setting Clear White at Low

Post process settings
All disabled except - Clear White (Low) and Smooth Gradation (Medium)

Using these settings, I've managed to get delta errors to less than 3 which is the optimal limit for a mid-range LCD LED TV.
Measured gamma point is at 2.38 which is just 0.2 point away from the standard set by ITU and THX as a reference level.

Input lag with these settings is at 19ms (+4ms from an everything disabled 14.5ms W6). Rule of thumb, anything under 30ms is optimal for games, under 20ms is exceptional in today's standards. Many SF4, Blazblue, GG, MvC3 pros play on 40ms HDTVs.

*Note*
You can choose to enable Reality Creation (limit it to no more than 35 though) if you want on games which aren't natively at 720p (which sadly, is a lot of PS3 games). This sharpens images across live polys and textures as well, but it does make aliasing pop more.
Reality Creation adds about 15ms of input lag as well. I really only enable it in games where there's an excessive use of AA (again, not many PS3 games sadly).

Hope that helps.