i have xfx 8600GT udf7 model which is quite commonly available in the market.
1)its working but severely overheats. goes beyond 100C sometimes . many times crosses 90C
2) ya , i have it. ^^
3) it costed me 8k wen i bought it in june07. now its around 5k
4) its enough for COD4 . u cant run crysis with eyecandy . it wont run crysis well enough. but it runs crysis in mid-low settings.
my advice. stay away from xfx for 8600GT . if u can get xfx 8600GT udd3(7) or use3(7) models , get them . stay away from udf7(3) models.
get POV/galaxy 8600GT if ur budget is around 5k.
8600GT doesnt need a gr8 psu . it runs well on local smps as well . if u have enough money , get a zebronics 500/400W pure platinum
if u can extend ur budget upto 14k , get xfx 8800GT.