Speaking of batteries, I've got an Optima redtop in my S14 and I'll never put anything less in there. I've been wiring up my stereo for a week with the doors and trunk open, ran-in the system with the engine off. Go to start it after several weeks; no problem.
System is in and needs some tweaking. Broke down and bought a CDA-105. Installed USB port in the center console. New interior is installed. New digital climate control is installed and works, but needs some tweaking. Starting to turn into a pretty sweet car!