Hi, I use a GR pre into 1176 into GR EQ rack units. The eq is Extremely musical. I’ve had it about 4yrs now. It is delicious! I built the 1176 blue stripe. Also performs at top notch level
The GR rack eq is a totally different beast from the Harrison 500-Series one but I assume the point you are making is that Great River gear is great in general.
I don’t have personal experience with their gear but I know they do have a stellar reputation and if they are local to OP then even better.