Help needed with my weird pentagon room

I want to make a mixing and editing room (no recordings). I hope some one can help me out. Any idea of the best monitor position? Is there anyway to calculate standing waves? Should I place melamine foam on the unparallel walls too? Any ideas of making the room balanced? and how to get rid of the 135hz peak :\ Here's an attachment of a measurement and sketchup files , measurment was done with speakers placed on the 38% room lenght spot (close to the unparallel walls) with melamine foam on early reflection spots. Thank you very much. (REW file was too big for uploading)

Hi "asr0086". Please read the forum rules for posting (click here). You seem to be missing a couple of things! :) - Stuart -