I looked into CAI's for some time and was well aware of all the pro's and con's listed above. So with all this in mind, I designed my own intake to be as good as it possibly could be. This is what I came up with:
Made completely from carbon fiber, heat soak was no issue (no was weight!!). I used a BMC carbon enclosed cone filter capable of flowing 650hp (no restriction there!) and I use a carbon ducting piece to seal completely onto the factory opening in the rear fender.
Gives brilliant performance, incredible sound, no heat soak, no sucking hot air from engine bay and filter maintenance is negligable.
Sam