I have been looking at a bunch of processors and I may have found a lower cost alternative to the big boys. These are really popular with the HT crowd. I have seen them in a few car installs as well.
Parametric and graphic 30 band EQ for L+R, adjustable x-over slopes and more.
http://www.minidsp.com/products
They also have add-ons for a rear and center channel. with the same processing power.
Here is their forum
http://www.minidsp.com/forum/7-car-audio-projects
Any of the big dogs want to chime in on this?