What is your budget? An Athlon II x4 for $100 is the best for the money right now and should be several times faster than your current processor. A decent motherboard for it will be $60-100.
You will need new ram as well. 4 gigs of DDR3 1600 can be had for $94 although if you can't afford that just get 2 gigs for now and add more later.
well what im looking for is more of a new processor slot because i have a socket a and im not sure what i should upgrade to. and where would i get something like this... links are lovely lol