My Problem is that my current studio is also my living room,
Firstly my Mrs wouldnt take to kindly to me sticking panels all over the walls and ceiling,
Secondly we do not own the place we live in and i therefore shouldnt stick things on the walls that may cause the need for refurbishment when we leave.
Of course nothing beats doing it properly and acoustically treating a room,
i know this only too well, I work in broadcast engineering and am in properly built and treated studios every day and the sound is mind blowing.
But for people like me who cannot mess about with their rooms to acoustically treat them, eq/room correction (as far as i can tell) is the only other soloution.
From what i have heard ARC measures your room and creates an inverse eq map of the results therefore theoretically pushing the room to a flat response.
But as far as im aware this only sounds correct for 1 listening position (although ARC measures up to 32 points but correct me if im wong doesnt create 32 listening positions from the results) and if you move your head 1 foot in any direction it messes everything up and sounds wrong.
Whereas i think ERGO creates a listening position and a room wide listening position meaning it corrects the whole room not just the listening position.
It also sends out a multitimbral tone to excite the room and bring out peaks and troughs, rather than a monophonic sinewave like ARC.
I cant remember the full story but read the info and watch the video on the KRK website to see where it differs from every other EQ correction.
The Main point is that it is not an inverted EQ like most others.
Of course i havnt heard it in use yet so i still cant say for sure what it does and what a mix sounds like in my car or on my hifi after using it but it sounds a step better than ARC etc...
Rather than buy ARC i would give Room EQ Wizard a try, its free: Room EQ Wizard Home Page
Im doing that right now to see if it makes any improvements to my room before i spend any money.
So for me and Ergo, i just have to wait for it to be released and then listen to it before buying it.