Ordered it and just received today.  It's no stacker, but it's a lot less and still has a lot of bays.  As configured it comes with six open 5.25" bays, plus three more 5.25" bays converted to 3.5".  I bought two CoolerMaster 4-in-3 stacker bays (four 3.5" drives in the space of three 5.25" bays), so right now I have space for 11 drives (I could rip out the bottom drive bays and throw in another one of those CoolerMaster 4-in-3s, but I won't worry about that until I need that twelfth drive).  Shipping was reasonable, only $17.10 for me.

 

Product link: http://www.microcenter.com/single_product_results.phtml?product_id=0279208

 

For an even more bays, check out the Aerocool Masstige (it's getting harder to find, but newegg and directron still had some in stock last I checked).  You'll pay over $100 though, I almost went with it but this Thermaltake case was pretty close and about half the price.

Nice case, just got mine in yesterday because of your post.  Gonna put in 3 Athena 5 in 3 backplanes. 

I bought one too, After seeing the centurion 590, I decided to reallocate this one to my quad core station and use the Centurion 590 for unRaid.

 

With the 590 I plan to take off the smaller fans on the trayless sata removables and use the suction of the 120MM's to cool off the drives.

 

However, the M9 is very a nice case and was well worth the price after rebate.