Just an update... My next big project for the fall will be a good sound system for my Boxster. I've got room for 10" subs behind the seats, so tonight I ordered a pair of these:
http://www.poweracoustik.com/pa2006/product_AUDIO_wof_STW.htm
I got these because they could handle the most power of any shallow mount subs. I'm excited. I haven't done a sound system since I competed in IASCA/USAC in 1996 and 1999. I've got the following components, most older but still like new:
Kenwood KDC PS905 CD headunit, pre-amp only output
Rockford Fosgate Symmetry EPX2 14 band EQ
Alpine PXA H-600 parametric EQ and time delay processor
Circle Surround CSA 12 surround sound processor with echo
JBL Power 80 X 4 amp (dash and rear)
JBL Power 180 X 2 (doors)
JBL Power 1200 X 1 (I'll run 600 Watts to each of these 10" subs)
Honestly I already have the Becker DSP system with time delay, preset EQs, and echo, so I don't think these processors will really gain me much more than what I already have. The JBL Power amps are about six years old, but new in the box, never used. I may just opt to keep the Becker system for processing and add the amps and speakers for greater output. So I'll focus on the sub and amp install first with an eye to whether or not I add the processors later.
The door speakers have already been replaced by Polk components, which I will also finish out in the dash. It should be a really kicking system. Expect to see more by the end of the year. I'll be doing the install and enclosure fabrication myself, so I expect it to take a few months...