A few ideas:
1) What if I removed my liner and replaced it with Dynomat? I would think I could kill the noise and reduce temps as well.
2) If you remove the weatherstripping against the cowl, it creates even more airflow
3) What about removing the headliner, putting in some dynomat, adding the heat sheild on the intake, AND adding some heat extractors/hood slits for either cold/ram air induciton?
I think that #3 would be the hot (not literally!) ticket as it would ensure the air was cool going in the intake, and sound would be controlled as well.