But, I think that AMD processors are cheap and i need more cores(for 3D modelling and gaming). Can u please tell me in detail why you're recommending me to buy Core i5?
For Gaming, even most game aren't capable of utilising 4 cores, so forget about 6 cores for them.
3D Modeling, well some applications there may use 6cores, but at the time being, it is not needed, you may want to go for 4GB+ though depending on how intensive you gonna use it.
They are Recommending i5 Sandy Bridge and Not i5 previous series.
i5 SNB's are capable of performing 20%+ compared to i5 previous series, though being at same price range.
I don't remember the link atm, try searching AnandTech review and you will know yourself