Hi AJ ( @itexpertak ),
Welcome to the community. That is kind of a loaded question since many audiophile's don't believe in EQ at all. They "fix" the room instead. That being said, I personally use a Behringer Ultracurve Pro DEQ2496 that was set based on measurements from Room EQ Wizard (REW). I can't say I'm an audiophile, far from it, but my system sounds good to me.
Hope this helps,