I am considering (yes, again) on building a budget gaming PC and i am down to making the decision of whether buying the Pentium Dual Core G860 (http://www.newegg.com/Product/Product.aspx?Item=N82E16819116405) or the Core i3 (not sure which one, in such case, which one would you recommend?). Nothing fancy, mainly Valve games like CS:Source, TF2 and the occasional MMO RPG. Also, for those purposes, would a GTX 560 TI or a GTX 550??