Well from my personal experience about Broadband well for Broadband go for Tata,Tikona,Airtel,BSNL all are really good because the technology they adapt is good and their backbone is also good and even service is good except BSNL as you know its govt.service so less trained staff.
1) But as CE Engg more shocking thing for me was none of the ISP have technician which can deal with problems linux or you can say other then Microsoft Operating Systems.

2) @ SPIDIGO :- According to Trai the have Norms are Min 256 kbps and how can you offer a plan of 128 kbps?? so try not to cheat the customers who don't know all these....

1.0 Broadband connectivity:

Keeping in view the present status, Broadband connectivity is defined at present as

“An ‘always-on' data connection that is able to support interactive services including Internet access and has the capability of the minimum download speed of 256 kilo bits per second (kbps) to an individual subscriber from the Point Of Presence (POP) of the service provider intending to provide Broadband service where multiple such individual Broadband connections are aggregated and the subscriber is able to access these interactive services including the Internet through this POP. The interactive services will exclude any services for which a separate licence is specifically required, for example, real-time voice transmission, except to the extent that it is presently permitted under ISP licence with Internet Telephony.”