I own this case and the maximum you can fit is ten 120mm or 140mm fans. I would recommend Cougar Vortex fans if you don't want LED's but if you want LED's with the most CFM and still maintaining low noise, go with the Aerocool Shark series they move about 90Cfm on the 140/120's and are pretty quiet. They also look good with the LED's. Comes in Red, Blue, Green, White and Black colors.
They go for $16.99 each on newegg.http://www.newegg.com/Product/Product.aspx?Item=N82E16835129064