few questions on new system

[playyamxz550 10+ year member]

I sold my old system which was 2 xl 18's on a dc5k. It's time to upgrade and I got a new truck and wanna start new so I was thinking of going with 4 15inch xl m2's. The real question is Im looking to power the system with a dc9k or 12k and which should I pick because im trying to run at a normal 14.4v and still get my subs some good power. The truck is a 2008 escalade now im looking to run the stock alt for just the truck and then get a dual braket alt with a dc 270xp on it. my question is if I run the 3 runs of 0 gauge of that to 4 deka g31 battries would that be enough juice?

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[playyamxz550 10+ year member]

ttt?