can someone tell me when they say standard on the fans if that means the fans come with the case. for the optional fans do i need to buy and install them? also what is the difference between internal and external drives? does that mean internal drive bays are just to hold things and external drive bays are the only ones i will have access to from the out side of the computer? http://www.antec.com/us/productDetails.php?ProdID=81800