Get an E5200
Stock
2.5 GHz
200 MHz (core clock)
800 MHz (FSB)
2 MB L2 cache
OverClocked
3.33 GHz (stock Cooler is fine but it's better to switch to a Prescott Intel Cooler very cheap Rs900.00)
266 MHz
1066 MHz
2 MB L2 cache [He he

]
Win 7 Index score 6.6
Final piece of advice
Don't play with your ram
Though benchmarks showing you a huge performance boost
in real time it's not
And the rams we have over here Sucks.
So don't play with the Voltages