Cooler Master makes so damn many case designs. Something about the Storm Enforcer borrows from the HAF 922, with the 200mm front fan intake. I always thought these CM 200mm fans were limp. Of course they're limp for low static pressure owing to their size and speed, but they don't have much of a speed range. I think I replaced mine with
Bitfenix Spectre Pro LED 200mm. Yeah -- that's the one. Howsoever you need to remove the original fan, getting those things in the front case-panel was a bitch.
The Bitfenix comes with some long, odd-shaped rubber fan mounts. To me, it's important that the mounts separate the case-metal from the fan frame.
NZXT makes a high-CFM 200mm fan, but I don't think it's an LED fan, and the four mount points are a slightly different radius from center than either the CM or Bitfenix -- or the mount holes on the CM cases for that matter. So again, you have to invent a tricky DIY solution. I think I used wire ties cushioned with Spire foam pad.