Two more to consider: If you want a lot of bands, I have had good results with a semipro unit, the Rane ME60, with thirty sliders per channel -- www.rane.com/me60.html. I you can get by with fewer bands, I understand the old Cello Palette is very musical -- you might be able to find a used one.
I know this is heresy, but...
I am interested in adding some sort of equalization within my system....tone controls for lack of a better analogy. I know that years ago Audio Control used to make a band equalizer. Anyone out there making that sort of device today? Basically I am looking to add a little more bottom to my system without adding a subwoofer or adding a lot of noise to the sound. Thoughts?