I`ve been using samsung air conditioners at my home, I had 2 already at my bedrooms and I had planned 2 more for my first and second floor-which are newly constructed. I recommend samsung because it fits the typical Indian Demands like good performance- reasonable price.
I m using these since last 2 years and I had not a single problem with any of ones, its very fast cooling (the 1.5 ton) at medium noise and very low consumption of electricity. Though there are ACs available in market today that claim that they had the lowest noise (like Daiken, hitachi etc) but I m afraid about their consumption of power, which may be more & there are ACs with fastest cooling capacity but again power consumption may be more, but with Samsung I found that its everything packed in one piece. so I suggest u to go for samsung`s 1.5 ton capacity machine, its the best one I had seen around.
-kalpen.