The best thing on Air for a decent price is the Hyper 212 Evo.
It will fit in that mobo but it is a little tall so id be more concerned about if it will fit in the case. I have my i5 overclocked to 4.4Ghz using it and it never even gets close to hott. Plus you can pick it up for like $40.
Alot of people use it. It works with all Intel and AMD boards so your AM3+ board is compatible with it and like i said, it should fit fine. Other people have used your board with that cooler successfully.
Hmmmm Alright, cool. I'll pick it up whenever I have the chance. Do you know of any liquid cooling systems that would possibly fit in this build? I would still like to use water if I could.