Looks like I am little late here, but thought I should get the word out that SilverStone's TJ04-E and KL04 can natively accommodate up to 9 HDDs plus 6 SSDs and 4 5.25" drive. From what we know, they are the smallest ATX cases to fit that many drives.
TJ04-E
http://www.silverstonetek.com/product.php?pid=325&area=en
OCUK's own KL04 page:
http://www.overclockers.co.uk/showproduct.php?prodid=CA-171-SV
As a comparison, the size of the cases:
Fractal Design Define XL - 72.9 liters
SilverStone TJ04-E & KL04 - 51.2 liters
Bit late mate


Nice case though ,nice features especially the heatsinks for the hdd stack