will my system be getting enough power?

[03 Xtreme Fosgate]

I would recommend going with a different alt besides that napa alt,not really going to be enough for what you're wanting to do. It's better to save up and have more than enough that's needed in case you end up upgrading at a later time. You also need to do the Big 3 wiring upgrade,that helps alot with dimming lights.. Shop around for the alts,check Mechman alts they're probably the best on the market.