Just got a IS250. Need to get a system in it ASAP. It has the factory premium system and it isn't 1/2 bad but needs some bass. It is amped in the trunk. What I have laying around is a 10" Adire Koda, a cadence z5000 (750w RMS x 1 @2ohms) and a cadence q3000 (2x100W). Trying to figure out what to...