Upgrading under hood Chevy Duramax

[UsAmpsFreak]

So i'm about to put a system in my truck. Have installed at a shop for 5 years but am out of the scene these days and not totally up on what's good now. I've decided to upgrade both of my batteries under the hood instead of possibly needing to add an Aux battery later on. Here's what i've decided on and was wanting feedback on what other technically knowledgeable car audio enthusiasts thought.

Here it is:

2 XS Power D3400's

1 Mechman 270 amp h/o alternator

Upgrading all charging cables to 0 guage

Haven't completely decided on what amps i'm going to go with but i will be in the area of 3000 watts rms. I don't mean power acoustic's make believe 3000 watts either. Thanks for any input.

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[Tripn88]

Not sure if duramaxes are the same but I just bought an xsp310-313 to control the voltage that I charge at.... my truck charges at 14.6 cold. Warm it stays at 14. Just a thought. D3400s are a good choice.

 

[UsAmpsFreak]

That's cool. I think that's about what my stock alt charges at. I wonder how different the Mechman alt i just ordered will be charging wise.