For $90 you can get the Corsair TX650V2 http://www.newegg.com/Product/Product.aspx?Item=N82E16817139020
Its a very high quality unit & will provide enough power to your rig & will also be sufficient for two 7850s if you plan to crossfire in the future.
As for the CPU cooler, the stock cooler should be silent enough & it cools well too.
Edit: If you're looking for a cheaper PSU, then get the Seasonic M12II 520Whttp://www.newegg.com/Product/Product.aspx?Item=N82E16817151093&Tpk=m12ii%20520
Again, A very high quality unit, quite sufficient for you rig & its modular as well.