I'm setting up a simple recording room. The space available is one small room so it must double as both sound and control room. I was planning on getting some circumaural, closed-back headphones for both monitoring and hearing protection. But I will only get about 20db drop and I want more. So I got the idea to use in ear monitors (about 30db attenuation) then adding some circumaural ear muffs protectors (like these http://www.hearingportal.com/products/products.asp?id=1) for another 30db. I have never used IEMs before but I can't imagine a reason why this wouldn't work. Any thoughts?