Planning on Building a Computer

[YakuzaIce]

Which would you all recommend?
Getting...
CPU
http://www.newegg.com/Product/Produ...N82E16819103547
Motherboard
http://www.newegg.com/Product/Produ...N82E16813127207

or
getting a better video card. And if I do the latter which is most worth its price?
Original:http://www.newegg.com/Product/Product.asp?Item=N82E16814150091
or
http://www.newegg.com/Product/Product.asp?Item=N82E16814150100
or
http://www.newegg.com/Product/Product.asp?Item=N82E16814150093

Is XFX good? What is the best for around $500 +/- and $300 +/-?