Really depends on your budget, but I would go for the Intel Core i5 3570K personally.
What is a good motherboard for the Intel Core i5-2500K? This is going to be a gaming computer. This is my first time building a computer. Thanks
Amazon.com: Intel Core i5-2500K Quad-Core Processor 3.3 GHz 6 MB Cache LGA 1155 - BX80623I52500K: Electronics
Like Ravallo had said it really depends on your budget.
If you got the money buy a intel for sure, they are the best you can get for your money.
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Well you gonna need to buy a socket 1055 motherboard. You should look for asus or gigabyte.
Had good experiences with those
kpate111 (11-06-2012)
As Bengali said, I would upgrade to the 3570K as it is a 3rd Generation processor. It will also give you a better 'kick' when overclocking. When purchasing motherboards you have to think what price range you are looking into, what brand and are you going to overclock. A motherboard that allows overclocking will generally cost more than a board that doesn't allow overclocking.
Right now I own a ASRock Z77 Pro4-M motherboard and have an Intel i5 3570K on it.