TBM (Tan Boon Ming) offers a better deal I think. I bought 55" X90J last week with Sony official 5 years warranty and free 1 month Netflix card for RM4,550.

The X90K compare to X90J not much difference other than these features

1. AUDIO POWER OUTPUT (10W + 10W + 5W + 5W on the X90K) vs (10W + 10W on the X90J)
2. X90K has BRAVIA CAM option and Core, not on X90j.

Deal with Derek (branch manager) at their Old Klang road HQ/main branch.

Good luck.