[konafocuswrc]

i will say, go with aftermarket deck and then upgrade stock speaker..

and add amp for sub, and add amp for speakers..

6x8 is the size for focus..and also 5x7 can be fit no problem..

try jbl, jbl gives you a bit more bass than other brands..

changing factory deck to aftermarket gives you noticable difference..

visit any of best buy or future shop, they don't carry dash kit for your car but can be special ordered from local supplier which takes 3~5 days..