I've got the AEM short intake, and it has worked really well. Nice boost in power and sounds cool. Though now I'm thinking about moving up to the Focus Central CAI. It matches up with their hood scoop and I like the idea of pulling strait outside air. It all just depends of how much $$ you want to spend. www.myfordfocus.com has a great list of what's available.
FocusSport Cool-Flo is great for just a quick and easy gain. The rain that flooded the streets of LA yesterday was a good reminder why I don't get a full bore AEM CAI.... cuz I would have been screwed in some of the puddles I had to go through.
Me too on the Iceman; in black it looks stock--I have had three techs look under my hood and not one of them noticed--and one of those guys even owns a ZX3. The Iceman has good response and it sounds throaty w/o being obnoxious.
The Iceman is based on the design of the stock airbox, which is shared with the SVT--good for 170HP+. All they did was to refine the engineering that Ford already had--which is why the Iceman also has a Ford Racing part number and is CARB approved. Its a nice part for $200
I think I'm the only guy here who has the KKM (Kurtz Kustom Motors) Short Ram intake. It has a good sized bore and good quality material and no fitment problems. I like it. I've made other "ghetto" mods to channel cool air to the intake. About $150 shipped. www.kustomz.com