Hi Steve,
I have a Gen I but it takes 6 1/2's all around (doors and sub). I have 2 pairs of Infinity Perfects (components) in each door and 2 focals (sub) between the driver and passenger seat. If your interested in the Infinity Perfects they retail for ~$600 but you can find them on ebay for under $200. They sound crystal clear, but require 100 watts RMS (continuos power), therefore it is necessary to run a good amp. I have 2 infinity reference amps which are great thus far. Both amps are mounted on the floor of the trunk under plexi glass. Looks sweet. BTW those speakers sound just as good as many high end MB Quarts ($800) and focal high end ($1,100 a pair) component systems. Thats just my two cents.
As far as the sub woofer goes the focals hit, but I have yet to figure out where to put something bigger to get more bass.
I have a pioneer deck, but from what everyone has told me sony is the way to go.
Rewiring this thing has been my weekend project for several weeks. Let me know if you have any questions.
Steve