There are a number of surveys (Mercer, Economist, International Living etc) that rank countries according to quality of life factors and it's always the same places at the top of the list: Western Europe, Australia and New Zealand, North America, maybe Singapore and Japan. These are all, unsuprisingly, expensive places to live.
Wealthy people immigrating is a global phenomenon too; a few months ago there was a spate of news articles regarding rich Chinese looking to get out of China due to the low quality of life (eg http://www.time.com/time/world/article/0,8599,2077139,00.htm...).
Ambani bought himself a building and a helipad to commute to his office. That way you've fixed the commute problem too.
Bangalore weather is also pretty awesome. I wish I had my kite and board ... its been windy the whole past month ...
With the rampant unemployment in the US - I cant see why you would consider the US to be the higher quality of life right now.