Is there a big differences between these two other then the price? Is it worth paying the extra $50 or soo for the 9833 model. I got 2 kicker L7 solo barics 12" with MTX 1501D amp...so im looking fo with good options for subs and stuff. And i know these got them, but wat yall think....is buying the 9833 model worth it. Or just stick with 9831?