ivy bridge version of processor you choosen this is a up to date version is cheaper and less power hungry and faster
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116504
this motherboard is a msi motherboard it runs the best chipset z77 and means you can run any of the i series on it without flashing the bios meaning its simply install no nonsense cheap to boot there good makers military grade components
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130653
power supply recomendation psus get old that psu wont pull even 300w i bet its a no brand and no 80 certified
get this 1 its on sale 40 dollars with promo offer 600w psu 80 plus certfied means its means it will work at least at that output which ocz are good makers
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341017
now graphics card keeping in mind a budget
the 560 se is a comfortable card medium to high gaming 115 dollars cheap
http://www.newegg.com/Product/Product.aspx?Item=N82E16814134153
ram
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233335
and this ram 39.99 dollars low profile incase you want a 1155 cooler which i recomend cooler master evo 212 with mx4 paste you can find it on the site it will keep your cpu cool especially with mx4 if on a budget the stock cooler works well
just check this site and amazon.com for the rest of your parts you need
best choices for gaming if on a tight budget ignore guy below me
a fx 6300 competes in games does poorly in every day tasks and takes up more energy but is cheaper
in the long run the i5 is a better choice saving you energy bills at present
but when haswell come out it will be a new motherboard most likely
amd usually stick to the same motherboard constantly up to 4 generations at least