MTX Jackhammers FTW!!! seriously!!! I had 2 JH4512's in a WestCoastCustoms/ Orion ban pass box powered by a 1200 watt class-D amp ran a Sony GT-250 head unit and a Sherwood 240 watt for my 2 Kenwood 3-way 6*9s that included a 2.5 in tweeter and a .5 in ribbon tweeter and my 2 front speakers were 3.5 in Kenwood 3-way with a 1in. tweet and another .5 ribbon tweeter. By far the best setup I've ever heard and I know everyone says that but i have over 300 people that will vouch for that.
:edit forgot to add the Kenwood crossover
I'm not so sure about the 8s in the doors, never been a fan of them.
step 1 find a head unit with a decent sound processor
step 2 build your mid and highs i suggest polks in the doors and deck (original size) and dynomat
doors http://www.amazon.com/Polk-Audio-DB6...words=polk+6x9
deck http://www.amazon.com/Polk-Audio-AA2...words=polk+6x9
step 3 find the subs that you like if you want deep sound look at Memphis or MTX
step 4 have a box built specifically to the needs of the subs
step 5 find an amp that will have the ability to supply the subs with the power they can put out
step 6 THE MOST IMPORTANT have good grounds and have a adequate power supply I.E. use a capacitor if necessary and be sure your alternator can keep up.
i build professional stereos, i could help you out just tell me what your specific goals are and i will help taylor a system to you.
For the record I do not build crap that ends up having blown door speakers nothing but subs with a "horn" in the grill to simulate a "great" system that is stupid as h3LL and i hope that tend dies!
