Am not sure of EVGA cards in chennai but there was a thread in Dealer's section by Rahul of THEITWARES
http://www.techenclave.com/dealers-paradise/evga-graphic-cards-its-back-169439.html
but his reply of July 31, 2010 is that "EVGA 460 is not coming soon afaik"
your quad cpu 9400 should be fine with 6870 or 460 without loss in performance..
try anandtech's bench for some comparsions..http://www.anandtech.com/bench/Product/56?vs=76 (you (9400) vs me (E8400))
--- Updated Post - Automerged ---
GTX 570 coming in December -- GeForce GTX 570 to arrive in December + photo
so hold on for a month and get a good deal when the new year starts..
http://www.techenclave.com/dealers-paradise/evga-graphic-cards-its-back-169439.html
but his reply of July 31, 2010 is that "EVGA 460 is not coming soon afaik"
your quad cpu 9400 should be fine with 6870 or 460 without loss in performance..
try anandtech's bench for some comparsions..http://www.anandtech.com/bench/Product/56?vs=76 (you (9400) vs me (E8400))

--- Updated Post - Automerged ---
GTX 570 coming in December -- GeForce GTX 570 to arrive in December + photo
so hold on for a month and get a good deal when the new year starts..