Well I completed the swap out of the cases...was it worth it? I would have to say probably not. My noise floor appears to have dropped about 5-6 dB. However I believe the major source of noise may be a fan. I plan to swap it out this weekend and will measure again. One important note is that my CPU temps have not changed significantly. (averaging 2-3deg C. increase) I was worried given the nature of this new case having fewer ventilation holes.

The adventure continues...