Adding hood louvers (vents) to TJ Wrangler?

I'd like to add some louvers to my wranglers hood because I do a lot of highway driving and there is a lot of heat buildup under the hood. I was wondering however, since I installed an aftermarket air-intake with a large upward facing hole for the air to flow into.. would it be a good or bad idea to place a louver directly over the top of it? On one hand I could see where it would increase the cold air being taken into the engine. On the other hand I can see where it would run the risk of getting water on the air filter when it rains. Is it better to just place the louvers away from the air filter, or would I really benefit from having colder air right at the opening of the air-intake? Thanks!