Parametric / graphic equalizer recommendations

I have decided my system is too bright. Room treatment did not solve the problem so I am looking at equalizers:

dual graphic eq

(car) parametric eq

They have <.01% THD and 95 dB S/N ratio so don't see them hurting signal too much - I hope.

* Are these good brands?
* Do I need dual eq (one for each speaker)or is mono (average of both speakers)okay?
* Is 31 band necessary. Would 10 band be enough?
* Any place I can get an audio parametric eq. and is this better than graphic eq.?

Thanks for any help.