Looking to make the system in my new JL sound better. I opted for the non-Alpine system and I am now kind of kicking myself for it, as it isn't that great. Would like to add a 6 channel amp and put some higher end speakers in the factory locations. Would also like to add an aftermarket (small) powered sub as well. Anyone have any insight into this? I have scoured the web and can't really find anything that goes over adding a amplifier to the stock system.