Rear Fill? Is it worth it??

[R3nOSlaPP]

Vehicle: '17 Silverado Crew cab

Equipment list planned:

NavTV via optical to a JL TwK 88 DSP

Stevens Audio SA6-CS (no crossovers) (will eventually do custom doors with a set in each door)

Audio Dynamics 3.5

Subs: (4) B2 XM8's

Amps: (2) B2 2500.1 for the subs B2 1200.6 for the mids and highs

 

I am in a dilemma right now while planning out my system. I am planning on running a 3 way active setup up front with subs and everything would work out fine with the DSP in terms of available outputs. My dilemma was I wanted to also run a set of 6.5's and tweets in the rear doors ran off a 600.4 but I would have to change the DSP, which is fine but I am wondering if having rear fill is even worth it? Whats some pros and cons about having the rear fill outside of just having a speaker back there..

 

Wanted to get some opinions on this? Or if anyone had recommendations on other DSP's that can handle the 3 ways up front and the set in the back, active of course.

 

Thanks everyone