I got a couple hundred bucks to burn and want to see what I can do with my leased 2003 Jetta. I will want to keep the stock headunit in (will it still be possible for the system to be good?). Speakers, amp, and sub is basically what I will be limited to. Can I make something happen on a $300 budget? Are bazookas/powered subs total crap? I don't want cheap sounding, ground shaking bass. I would say I'm looking for 65% clarity and 35% power