You might get cheap service from Airtel. One of our member lost Rs. 1,400 for nothing and he didn't got Rs. 750 back ever after making too many effort
Here TS giving refund to customers for interruption in a service and with
t3chg33k case he gave a refund to ADTV because he's using sorry ADTV DTH.
I am not a fan of brand Tata Sky but agrees on a simple fact that no DTH can match Tata Sky's service. Before making such a huge decision please check this thread:
Airtel Digital TV HD - Swindled by Airtel | Entertainment Forum India : DTH , Technology and Entertainment Forum
Since you ask our suggestion tats a reason I made a comment on it. Airtel looks very glittery and shiny from outside but no professionalism from inside. They even ask to return hardware once not recharge and blackmail customers.
So make a decision by tossing all the aspect of a coin, final decision would be yours
No doubt TS is a costly brand but they always live up on their words.