Is balancing the tonal spectrum really what you want though? In the October issue of Guitar World (with Trey Anastasio on the cover, of Phish) there's an article about Dave Mustaine... he makes a smart comment in saying that you don't want to suck up all of the EQ possibilities with having a really bassy/middy/trebly guitar.. you need to leave room for the drums and bass. Metallica had problems with this on AJFA.