@s55, Haeir split ACs are good, dont know about any other product from them, but, Haeir Splits are good , no complaints yet and are easy on bills too !
Take the example of LG, they make best Refrigerators, very heavy duty, but their ACs are bad, real bad.
About Mitsubishi, my cousin bought one for a big hall type room and its 2 ton or 1.5 ton but he says that its the best !
Haeir or Mitsubishi, pick one !
Do one thing , read the weight printed on their outer Unit cartons, the heavier, the better, buy one with more weight with same btu.