I was at Rama V (somewhere in Jalan U-Thant, KL) yesterday and it's pretty fantastic. The menu is not like those regular Malaysianinzed Thai stuff. You can google up some blogs to tengok-tengok.

Btw, this place supposedly got dress code. Need to wear long pants and shoes. But I guess yesterday ada exemption because of Father's Day. I tengok the table beside me pakai seluar pendek only.