Hi Scott.

Just jumping in here.

RB/PT has a good parametric, but unfortunately it's not real-time. That is, you can only render with it.

I tend to use the Antress Modern Deep Purple quite a lot and find it very effective. Antress do quite a few EQs and you can see the range here -

http://www.gersic.com/plugins/hosted/antress/index.php

Hope you find this useful.

ROG.