Cpu cooling fans?

Well I have a http://www.newegg.com/Product/Product.aspx?Item=N82E168... cpu cooler cooling my i5 3570k ivy bridge, after fighting with those freaking push pins *first build* I finally got them snapped in and see an avg. idle temp at bios with stock times at about 30-32c *29c is the lowest I see 32c was the highest* these temps may not be super accurate but I've recently added some artic silver 5 and I've been restarting and starting up so its slowly been setting in so I dunno if the temps will be much lower but perfect really for me not sure what those temps should be though. Well I have an open air case * was an antec 300* but took the rivets out and all of the fans *may add some back* and layed it on its side, looks really good. But I have the cpu coolers fan facing away from the exhaust vent so the case vent is here: [ and the cpu fan is facing this way ]. I have a coolermaster sickleflow 120mm cooling fan and I was wondering if I should put that fan in there to push the heat out of that case vent or pull it in. As far as I can fell the cpu fan is pulling or pushing * im still iffy on how to use those terms* air outwards. SO IN conclusion would it be a better deal to add that extra fan or leave it as is? Thanks. Sorry for the long post!