Thinking of selling my Rockford Punch 800a4 and getting a Phoenix Gold Octane-R 15.0:1 for my subs. It should be better than what I have already for my subs, and good enough for the 10in Brahma I am planning on getting this summer. How much do you think I can get for my Rockford 800a4? It's in good shape, but showing it's age, no manual with it though... But I have the PDF for it I can get the Phoenix Gold amp off eBay brand new for about $300ish, so depending on how much I can get for the Rockford, I might just sell or keep it.. Next question, I have Stinger Multi-Amp 4 Ga. Amplifier Wiring Kit it says it is good to 1400watts, so I am assuming it should be enough for my setup if I got the Phoenix Gold amp which would be paired up with my JBL GTO 75.4 amp (powers my mains, which I have now). What are your thoughts? By this summer I am thinking buying a new battery, thinkin an Optima Yellow Top possibly. Your thoughts?