Right now, I have a Skar ZVX V1 18" in a ported box built to spec tuned to 34Hz powered by a Skar SK-1500 down to 1 ohm. Also have some B2 Audio Es6.1 components in the front. Big3, 2nd batter thats 100ah, 80a alternator, MTX RT4240 amp for speakers that does 45x4. Now, I am looking for some mids for rear stage MAYBE. I am mainly curious if they are worth getting speakers for the rear stage. It is a 5.25 speaker size, and I am wanting suggestions for them. Not really a budget, just looking for something nice if it is worth it and a noticeable change.