Thanks for the tips guys...
I definately think I was too close... after listening more and more I think that the FOH mix for Mayer (the band that sounded the worse) wasn't well suited for being taped that close (very bass/mid heavy). During the Crows set, though, it didn't sound nearly that bad and the tape is very listenable with a small EQ drop around 32-63hz, and a slight rising boost around 2khz-16khz. Just helps get the rumble out.
Another thing I'm also considering -- I decided to do the show last minute (free tix, why not) and my shockmounts hadn't arrived yet, so I'm wondering if the vibration from the stacks (and mainly the subs, which were just a few feet away) were coming through on the tape muddying it up. If so, definately an endorsement for using shockmounts..
All in all I think the Earthworks are great mics, I don't think I could've gone up in quality unless I'd spent 3X what I'd spent on these...