Choto Cheeta
Rebooting
(1.)I was thinking of buying corsair value ram they will cost around 4k for 2x1gb or just 400-500 more than transcend or kingston.
Poeple preffer those crosair models for their endurance for OC, and which is ruled out in ur case... so saving Rs. 500/- means u can think for some extra fan as u were thking for them !!!
but once again, all i can do is express my thoughts and opinion, fact is its ur system, and if u find budget permits... go for those... as once agian putting those in wont harm the system
(2.)IF I buy 8600gt i will have to oc it and that will void it's warranty thats why I am thinking of buying a 8600gt fatal1ty as it is factory overclocked to max. and is passively cooled.I want the 3 year warranty XFX gives as I know sooner or later I will burn/damage my card.
Choise is urs,

So here are the facts for u,
Transcend 2x1 GB DDR-II 667 MHz => Fine
Crosiar 2x1 GB 667 MHz => Fine (personally I fear true potential wont be utilized)
8600 GT => Fine
8600 Fatality => Fine (once agian my personal opinion may be the board wont be able to use the extra speed and bandwidth over GT)