please, critique my prospective build

[Kelvartis]

Currently:

jl audio 500.1 & 300.4

L7 12" 3.24cu @38

infinity kappa 6.75 w/ passives and domes @ 2ohms

1 extra battery & stock 76 amp alt.

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On the sketch paper:

Two lethal injection 12's fiberglassed/mdf custom fit ported (don't know size/ports yet)

Continue using the Infinity Kappa's

3rd battery and HO alt

Brutus elite 2100.1

Brutus elite BRE60.4 (120x4 @ 2ohm)

Does this seem like a balance of quality and power? will I be disappointed with the sound of the mids and highs after leaving the jl audio 300.4 behind?

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[Jeffdachef 5,000+ posts]

keep the JL 4 channel everything else looks fine.