Base:
Seagate SATA-II 7200.11 RPM 32-MB Buffer 500GB HDD - Rs. 4,100 [4,500 max]
RAM - Value DDR2 800MHz 2GB + 2GB - Rs. 3,600 [4,000 max]
[for both, divide everything by 2 to get lower end config]
Zebronics Bijli cabinet with 400W SMPS - Rs. 1,500
Intel:
Intel DG35EC Motherboard - Rs. 5,000 [6,000 max]
Core2Duo E7200 - Rs. 5,500 ==== [or] ==== E8400 - Rs. 8,000
AMD:
Zotac 8200 Motherboard - Rs. 3,500
Phenom X4 9550 - Rs. 7,000 [8,000 max]
AMD has better performance here. If you want a better intel setup, you need to replace the motherboard with a 630i motherboard for 3.5K which would lack dual channel memory, compromising memory performance.