Ok, if you want to keep your existing CPU, then these are the upgrades I would get.
Motherboard:
http://www.newegg.com/Product/Product.asp?Item=N82E16813170143
Video card:
http://www.newegg.com/Product/Product.asp?Item=N82E16814130238
Motherboard:
http://www.newegg.com/Product/Product.asp?Item=N82E16813170143
Video card:
http://www.newegg.com/Product/Product.asp?Item=N82E16814130238