If you dont measure you dont know what your fixing. Room treatments both absorbitive and diffracting are necessary.Audyssey mess's around with the upper frequencies more than i like , Dirac not so much no idea about ARC .I say try the RC if you like it good, if not you can always defeat it.

DOG is GOD spelled backwards.
What others think of me is none of my business.
M80 V3 MY GLOSS Cherry