[cccbock]

My particular favorite for your application: polk db651s. Great bang for the buck and runs well off head unit power alone. You can spend a whole lot more for only marginal gains. Got mine here: http://www.sonicelectronix.com/item_9110_Polk-Audio-db651s.html

Also do the tweeters up front. Well worth it. The OEM tweeters are virtually worthless.

 

[cccbock]

Thanks CC.
What tweeters would you use?

I used the Infinity 1031t. Good choice if you like crisp. They can be a little harsh sometimes on certain songs. They will take a little bit of tuning to get the balance as you like it but that is to be expected.

There are a lot of good tweeter choices and just about any of them will be a vast improvement.

 

[cccbock]

Sub is behind the back seat. It is not much of a sub, but it beats nothing.

All tweeters will require some bit of fabrication on your part. Look through the "pimp your factory sound" thread for more hints.