@misd
Processor :
AMD Phenom II X3 720 (Rs 7,200) OR
AMD Athlon II X4 620 (5,400)
Phenom X4 will be a bit out of budget for you. the Tri core X3 will be the best bet for you. Although you might have luck with the
AMD Phenom II X2 550 Black Edition (Rs 5,200) Someone on this forum unlocked
all the four coreswith the Motherboard mentioned below.
Although you have three choices for processor
1) AMD Phenom II X3 720 BE (7,200)
(Superb performance for the price, and the fourth core maaybe unlocked)
2) AMD Phenom II X2 550 (5,300)
(Possibility to unlock the other two cores and make it into a full X4 Phenom)
3) AMD Athlon II X4 620 (5,400)
(The most value for money quad core processor, but lacks the L3 cache, but its a quad core by default. )
+Motherboard
ASUS M4A785TD-V EVO (6,900)
(has two Pci-e slot, very good onboard graphics and lots of options to tweak around with)
+
4GB DDR3 RAM kit (Transcend, Kingston , Corsair) (4,000-5,000)
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Total :-
18-19,000
I am not sure of the RAM prices, they should fall soon but DDR3 is a bit expensive at the moment. They might be cheaper than my estimate. Just be sure that you pick up a 1333Mhz module at least. 1600 and 1800 will be a lot more expensive.
Also do you have a good power supply unit ? ( Like 80+ certified with at least 30amps on the 12v rail ) from Corsair, Coolermaster or Antec ? The motherboard clearly specifies to have at least 300W of guaranteed power.
If not then invest 3,500-4100 more and get the
Coolermaster Real Power Pro 460W (3,500)
OR
Corsair VX450W (4,100-4,200) (you should go for this if your budget permits you)
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Total :
22,000 at most (including a good power supply)
The above config should meet your requirements very suitably