I believe so much in proper room setup and understanding it that I want to share. I've mentioned using a simple Radio Shack SPL meter with the Real Traps Test Cd many times. I've even offered to make the pretty Excel sheet. Nobody has ever done it as far as I know.
So, my offer is if you live within 45 mls of Charlotte, NC I'll come to you with my computer loaded with HolmImpulse, my mic and stand and all cables (XLR & RCA) and take some baseline measurements and a few others once we speak.
This data will be helpful to you so you know for sure what you have and where you can improve your sound. Again, the cost is nothing. There are 3 pretty decent size regional airports that I use if you are willing to fly private to pick me up.
Of course the measurements are yours and will be provided to you in the raw form and JPEG so you can share with anyone you wish.