Which is the best city in India to settle and why?

Assuming that both husband  & wife don't run out of career options (salaried) & future kids get access to good and competitive education. Old parents too may get some peaceful post retirement peace of mind and breathing space.

http://www.quora.com/Which-is-the-best-city-in-India-to-settle-and-why

http://timesofindia.indiatimes.com/india/Hyderabad-best-city-to-live-in-India-Study/articleshow/46463048.cms

http://www.walkthroughindia.com/lifestyle/top-10-green-cities-of-india/

http://www.retire2india.com/2007/09/10-best-places-to-retire-in-india.html

http://www.hellotravel.com/stories/best-cities-to-live-after-retirement-in-india

http://business.rediff.com/slide-show/2010/jun/02/slide-show-1-best-cities-to-live-in-india.htm.