"Power Bastards" alternators???

[Clear Image Dan]

I just signed up to this forum today.   

My original battery in my 2015 Sierra 1500 just died so I'm replacing it with an Optima.

I am considering up-grading the alternator as well.     Does anyone have experience with The "Power Bastards" 320A High Output Alternator for GMC Sierra 1500, 2014 - 2018 5.3L V8 (325c.i.)???

[Snowcamo]

If you have the funds for an optima scratch that and go northstar. That is what optima used to be. 

[Clear Image Dan]

Haven't heard of Northstar.  I'll check them out.    I just charged the original using "repair" mode on the charger.   Says it is fully charged but we'll see.    Thanks.