Jimburger, looks like a great system, just wondered if you had tried pulling the tweeter resistor and replacing it with a Cardas link or other good quality cable jumper? Then if the treble sounds too energetic, switch the speakers so your tweeters are on the outside. Just a thought, I noticed a big improvement pulling that resistor from my 3.6's, more air and more transparent. Magnepan recommend the tweeters being further away than the bass/mids, so looking at the amount of toe-in you have, I think that would have them on the outside. Anyway, you've probably messed with all of this and settled on things the way they are. Great system!!
Regards
Rooze