For those who asked, yes, mine is the K&N Typhoon and I also have the prefilter. I can tell you that after driving it hard, the metal tube usually still not hot, even though the engine is hot. As stated earlier I am a complete novice on this stuff so i have no idea what difference that makes - except when I touch exposed metal in a hot engine, I am expecting it to be hot. I concur that the Airaid is just eye candy, and likewise, only get the K&N if you like to hear your car sucking air and hissing like a crazed animal. If there are any performance gains under certain conditions, consider it icing on the cake.
p.s. You can control (eliminate)the sucking air sound and BOV sound by driving conservatively.....but why would you do that?