eh, a/a can be very effective with the right core. of course nothing beats water as a heat sink, i don't think anyone will argue that, but i do think most people just like the simplicity of an a/a. as i said earlier, can't beat an a/w setup at the track with ice in the tank, temps below ambient, but i'm not convinced it makes much difference in a street driven vehicle when you consider the extra room needed, the task of plumbing it, and the chance of pump issues and such, and no ice to help while street driving. an a/a is a one time install and is always working no matter what, plus you can always increase efficiency by adding methanol in the system without much hassle.
any datalogs showing what your iats are?