Glad to know it wasn't just me.
The mic provided with the 4310ci (DM-A409) does in fact produce a more accurate calculation. After 2 weeks of tweaking and re-calibrating the mic provided with the 4520ci (ACM1HB) registers a 3db to 4db spike in treble frequencies in the 10khz to 20khz range which would explain the lack of mid-range response I was getting, it also actually had lower mid-range results in the 200hz range. It took a "perfect calibration" to achieve my desired results. I used the mic placement diagram and instructions provided on the Audyssey website http://www.audyssey.com/technologies/multeq/how-to
, not the one that is displayed on the 4520ci's initial setup menu. I then used 2 thin wooden planks with holes drilled in them to screw the mic in at the recommended 2ft from the center on both sides, leveled on an ironing board behind the couch. The planks resembled a crucifix where the horizontal plank can be unscrewed and remounted 2ft forward and 1ft back as instructed. After all this was setup, that initial mic position is what determines the speaker distances, figuring that this is basically a numerical calculation, I adjusted the mic slightly until I achieved a TRUE numerical center, L/R fronts (exact same number), L/R surrounds (exact same number), surround backs (exact same number). Now you have to know that this was my intent when mounting my speakers initially, most people choose random spots or have odd shaped rooms.
Another important note was I made sure it was DEAD SILENT, I'm talking about turning the HVAC off, ceiling fan, directv receiver, any eletronic device that was audible. This was also done in the AM hours of the morning where there were no natural or people noises either. I couldn't hear anything but the natural high pitch feedback from my own eardrums. And lastly made sure that both subs reported the same db level. After calibrating the 4520ci this time, I was hearing sounds and effects in movies that I have never heard before, it was very well balanced. I always adjust the bass settings and crossovers to get that big screen effect for movies by enabling LFE+mains and re-adjusting the front and center crossovers to about 80hz. Last thing was increasing the sub level a little and I can't see how I can get it to sound any better. Some movies do have high squealing treble, for those movies i enable the cinema eq in the audio menu. The only occasional adjustment I make is when listening to music, I increase the center channel crossover a little to get a more natural thump from the bass drum (almost any Michael Jackson song excels in this, Man in the Mirror), 100hz usually does the trick.
In conclusion, I feel it took way too much effort to get the sound I was looking for, I had already started an ebay listing to sell this thing, but i think I'm going to stick with it for a while. While I give the sound about a 8.5 out of 10, the features are it's saving grace. Later i'm going to re-calibrate my 4310ci with the 4520ci's mic and hear what that sounds like, because although the bass on the 4520ci is more accurate, the 4310ci still has that classic boom in the bass/subs.