Hi All, Whats the best step in line for an upgrade to the bose sytem. its pretty good as standard but im after a bit more bass first of all then ill get onto the speakers at a later date. My questions are: What power is the current amp and how many channels is it? Are the speakers powered by the amp or the headunit? Is there a sub that sounds better off the standard amp? Andymac do you still sell those upgrade kits? also whats the fitting charge coz it looks messy one last thing is there any big threads on this as i cant find any via search? cheers!