Novice Needs Assistance emulating POT with Arduino

[system]

Thanks for the reply Mike, I've looked into those, it was one of the first things I found but I got lost when it came to choosing one.

http://www.digikey.com/product-search/en/integrated-circuits-ics/data-acquisition-digital-potentiometers/2556350?k=ad5204.

Any Suggestions?