Thanks, Mark! I had to look up Ron Jarzombek... I see he's into chromatic variations using various systems, so I do get the connection. All I need now is half his technique.
In regards to the mix... I've just uploaded a third (and probably final) mix, this time with more subtle changes courtesy of previous responses as well as yours - just a bite more hi-mid edge on the guitars, additional "thud" on the kick from a shifted EQ peak, and some grit on the bass for more edge and growl (ironically I am using Craig's Growl FX Chain).