You want an audio interface. Whats your price range?
I used this this: is like 100-150 and has all you need to get busy http://www.google.com/products/cata...a=X&ei=GQm3TvTuB8fM2AXErfDODQ&ved=0CHsQ8wIwAw
I have protools and use a Digi003 now, Good sound but out of your price range (Got mine factory new for a little less than 600)