Well, I would wait. having a limited budget like yours, Bulldozer from AMD could satisfy your needs better than SB would at a low price point.
However, it is still doable (you just lose any OC options, since the 2500K is out of your budget.)
2400+Asus H61 $258 shipped http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.631838
G-Skill 4GB DDR3 1333 $40 http://www.newegg.com/Product/Product.aspx?Item=N82E16820231396
Total $298 Shipped
However, if it strictly gaming, what is your GPU?