Hello all. Ok, I've been into home theater for well over a decade now, but now I'm ready to improve my driving experience as well. I have a 2000 mustang gt, and need to overhaul the terrible stock system (its not the mach one system) for around $500 - which would include installation considering I'm not going to do it myself. I like to turn it up too so I definitely would like significant power. I would like to do the whole thing - new head unit, new front and back speakers, amp, and 2 10 or 12 inch subs - however, I'm guessing that's pretty much not possible on my budget. Basically what I'm asking is if you car audiophiles out there only had $500 to improve your system, what would you focus on. In order of importance here's what I was thinking: New front and back speakers New Head Unit (how much rms would i need for pretty loud music if i dont buy an amp?) Amp Subs would a new head unit be that important if i bought an amp? obviously, any purchases that really arent mandatory i don't want to have to make. I don't know what install rates are from a decent place (no best buy, circuit city or any of that crap) so I'm guessing that's going to be quite expensive. Also, could i buy stuff from best buy but have it installed elsewhere? Thanks so much for your help - I can't wait to hear the difference!