Which DTH provider to go for?

Hi, I'd just bought a 32" sony LED TV. Now , I want to switch to DTH and is confused about chosing one....
I'd airtel HD and Tata Sky HD in mind, but can;t decide between the two...
airtel is a bit costlier though ......
Which one will be good to go for.....I mean whose picture quality is better..?
I live in Faridabad(NCR)