ok i got a 2000 mustang and i just pulled the stock system out.
as it stands right now i got a pioneer head unit mp4800 and a set of kappa 6x8's in my doors i want to add 2 10 inchers with an amp in my trunk and fill in the 6x8 holes in my rear window, also i want to give all the speakers more power as its 50watts x 4 right now.. im looking to keep the remainder of the build under 1000 bucks.. looks are not an issue

thanks

 

check out ebay phoenix gold 6 channel around 300 bucks and 2 octane 10's about 100 or a 4 channel and a 2 channel still around 3-400 bucks

 

and the 6x8's around 50 bucks