Re: big 3 or better battery?
Both! but if not both you would be ok with the stock electrical and having a larger reserve with a better battery. With the larger reserve your amp should run better and you should be able to hit more power hungry notes better, like those awesome lows. When i started my newest system, i just had stock electrical, 4 gauge ofc front to back, little wet cell bat under the hood, and the wet cell bat from my car that blew up, running an aq1200 and hdc3 15 wired at 1 ohm......it was good but lacked in long bass note output. when i upgraded to a kinetic hc2400 in the back i noticed a great improvement with those long bass notes. the big 3 just helps keep up the re-charge as you dis-charge, so it will be fine until u can or want to do the big 3 with just a better agm bat.
Good Luck tho
Vehicle....2004 Dodge neon sxt 4-door
Speaker amp....Old School Soundstream p205
Front Stage.....AQ 6.5" components
Rear Fill.....Vibe slick 3-way 6x9" coaxils
Subwoofer Amp......Hifonics zrx.2000.1D
Subwoofer....2 12" Soundqubed/Audioque SDC2.5's
Box.....custom 4.2 cubes tuned at ~36 Hertz
Kinetic HC2400 in trunk, interstate under hood, Big 3 in Cadence 0, Auditechnix 0 power
Stock 85amp alt