The Corsair really isnt the be all and end all like a lot on here seem to make out atm
The armoursuit is good, alternatively I'd look at the Antec P series, the P193 if you need E-ATX, the P183 if you dont. Both mid tower designs, reasonably spacious (193 is plenty 183 may require removal of a HDD caddy for new 5970 cards at silly lengths), good sound dampening (better on the 183 due to lack of side fan)
I think the fortress is mid tower also, which was last seasons must buy case, unlike the corsair now, lol