Whats the best option for me?

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1

http://pcpartpicker.com/p/Z4GyVn

http://pcpartpicker.com/p/CVCdxr

http://pcpartpicker.com/p/yMNrmG

2

the second one but i would have 8gb (2x4gb) for gaming also i presume you have an os

3

I would choose the 1st option. I don't believe the 280 worth that much more than the 270x

4

Second one.

5

Get this 280 though

http://www.newegg.com/Product/Product.aspx?Item=N82E16814131570&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=