You just turn the fans a different way around for it to be intake/exhaust. Just make sure you have enough intake fans or ventilation though. Antec, Arctic pretty much any decent brand name are all fine, but Id recommend Noctua http://noctua.at/main.php?show=which_fan&lng=en
Well not entirely the different way around, but more that the intake blows air into the case, and exhaust out. (obviously). Most fans it is quite clear which way the air flows.
This fan the back end is shown. It has the structure which holds the entire system. This is the end out of which the air comes.
The other end is usually clear, no structure in front of the blades. only behind.