hi i was going through this forum nice to see that there are such a lot of helpfull people out hereare some suggestion which will help one in making choice one needs to be clear of 2 things 1)purpose
2) budget
purpose- weither one wants for gaming or one wants for using it for video editng or cg ,3d purpose
2)budget i dont think so i need to tell u any thing regarding this
if one is taking a card for causal gaming one should go for a card like nvidia 6600 which will be coming soon any thing with 128 mb ram and ya find out about thepipe lines never go for the top most card go for one below the top most
if one is taking a card for hardcore gaming there is no better card then 6800 gt right now please dont go for ati card the drivers are not so good also this card can be used for programs like 3d studio max maya but the ati card is bad in this dept as it is known to have a lot of problems with maya
6800 gt works ok
but if you are going for use of application like maya 3d studio max please go for a proffesional card like a qudro tho its not so great with games its card drivers are specifically written for 3d application ther is a way of making a 6800 gt card into quadro you can go to
www.cgtalk .com go to hard ware forum were the procidure is given but one this procidure is carried out u can say good bye to games but its worth as a qudro is quiet expensive i am not sure weither a qudro is avilable in india it should be just find out and be sure what card u buy because they loose their value fast bye