I am highly considering building a PC soon, using parts from newegg, and i searched alot, sadly i am from work and i dont like to be like the others here that reply back to you with just alternatives and without providing a REASON WHY
but i dont have much time, maybe when i get back home and your intersted and you did some research i will follow up, anyway, consider those main parts :
AMD Athlon x4 740 or 750, you dont need more CPU horse power than this in gaming, anadtech made that same observation:
AMD HD 7790, this card is the truly the latest generation card, its actually an HD 8000, or GCN 2.0, really powerfull and amazing, and unlike all the rest of 7000 series this thing is one step ahead, some speculate this card the fruit of AMD with XBOX deal.
And this for mobo is great :
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130661
notice that the fact MSI cheaped on the chipset, and uses a lower one, allowed them to include a better power phase design with better quality components, cause this cheap 50 USD mobo have the same high quality components of MSI ~200 USD mobos, in contrast with this mobo
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130662
MSI used here the A75 chipset, more expensive, gives you USB 3.0 and SATA 6.0, in gaming those things are abit unrelevant, however the power phase desion is not the same
I am sorry if i analyze too much, but thats the way i do it when i want to purchase stuff, and it never failed me.