Capacitors

I need to know what a good capacitor for $100 or under is. Im looking for a good 1 farad at least, and for a cheap one that will help my Neon run 2 15" MTX Thunder 8000s. I will be getting a 1500x1 amp so I will want to plan for that setup. I am using a Legacy 1600watt and my lights dim, so I need it right now even. Is Kole Audio a good one? I like the look of that and the chrome Stinger capacitor. Give me feedback on these.

you have a very weak alternator. Go to a mechanic and ask how much would it cost to rewind your alternator to put out more output. Preferably over 110A.

Capacitor will not help if you have no energy to start with.