Hmmm. I ordered my SX830 from OnVia 8 months ago or so, and I'm not sure who did what, but my 830 came with the extra drive cage. So, I have the extra room for more drives. I really do like that case, tho. I replaced an Enlight 7237 with this one, and I have much more drive space. And I had an older 7237 with 1 piece cover, so this case with removeable door is also a great bonus.
One of the roomiest cases I have/have used is the Enlight EN6680. Only problem is that it's an AT case. But it has
(1) 3.5", (4) 5.25", and (4) hidden 3.5". Nice thing about the hidden 3.5" is that they are in "slide in" cages. Put
your drive in this little cage/bracket, and then slide it in. Easy to take out to get to other stuff. Great case (I have 3). One problem tho is that it's AT. Won't support my T-Bird. Hence the SX830.
My next mod to this unit will be to replace the PS with an Enermax 365 350W Whisper, and to replace my PAl6035 with a Taisol GCK760092. I want this thing "sprint/pin drop" quiet, if I can get it. Already have 4 Silencer fans in it, so this is the last of it, I hope....