^^Here you go
Mobo - Asus P5N-E SLI(Least for SLI Support and is cheap)$129.99
GFX card - Geforce 8800 GT 512MB (very cheap but a good performer),$313.00
Audio - Onboard
Hard drive - 320 GB SATA II,$84.99
Power Supply - OCZ GameXStream 700W,$109.99
Memory - OCZ Technology 2GB PC2-6400 DDR2(800Mhz),$65.00
Processor - Core 2 Quad Q6600 ,$322.00
I'll let u choose the optical drives and UPS,keyboard & cabinet monitor ect.
Choose a good monitor and UPS say 19" or above monitor and 650VA + UPS.
Sum Total - $1024.97 or Rs 41000 approx(INR).
Alternately post in this thread of Choto for more queries
Basic Guide Purchase a New System