Geojit seems to be cheapest.
But dunno abt the Performance of their website....?
http://www.geojit.com/services/Brokerage.asp?index=2&a=4
Delivery-based Volumes *
Volume *(Rs.) New Brokerage Rate
< 10 lacs 0.30% (current)
> 10 lac < 50 lac 0.25%
> 50 lac < 1 cr 0.20%
> 1...