One thing I would watch out for is this plethora of different EQ's. EQ's in the arranger. EQ's in the mixer. EQ's in the Bose processors...

It is going to get all too easy to have them interact with each other in nasty ways, one boost band on top of another, and pretty soon you are in sonic hell! It is usually better for the overall sound to try to EQ in one or two places, tops. If you have a mixer, and it's EQ is reasonable, why not concentrate most of your efforts there? Rather than putting a smile on the arranger's EQ, then putting a smile on the overall PA's output, then struggling at the mixer to make your mids and low mids punchy (you just notched them out twice!).

I personally try to run my arranger, AND my main PA EQ as flat as I possible can, use a good, pretty flat PA with a sub (not too loud - I hear WAY too many PA's with overbearing subs), and then what EQ I need for the arranger, or vocals, or the guitar is done at the mixer, and the EQ that makes the arranger sound full isn't effecting the guitar, or the vocals, or the CD player.

EQ is like using a strong spice. You don't want what is in one dish to flavor all the others...