Mutual fund for youngster

[MrWizard]

Hey i'm 20, I put 2000 bucks in an aggressive growth fund and a fundamental fund through a company called primerica. Anyway I get this feeling that maybe there is a better place for my money, even if its just another mutual fund. Where can I invest with the least fees and best returns? I want to start dollar cost averaging (putting 100-200 a month in) but I want to make sure I do it in the right place. Any advice on the best place to invest through and the best funds right now? thanks for any advice I'm young and uninformed!