I did alot of research on this last fall. My car was lowered with Aldan's and I did not like the performance of the car at all. The rear never felt right. I looked into eibachs and other ways of lowering but the end result was always Motons or nothing.
I've always found the stock suspension to be exactly what I like for ride/perfomance. I bought a set of unused stock shocks ($250) and fabbed up a custom fork for the rear that lowered the car 1 inch. This was a simple matter of re-drilling the hole locations and removing some material from the upper side of the fork (not much). Strengh is always a concern when doing something like this but the fork still seems quite beefy and strong. I highly doubt I weakened it much and my co-workers felt the same.
The front fabrication was going to be more involved so I went for a test run with aldans on the front, stock at the back. HUGE IMPROVEMENT! I loved it. In fact, it felt so good I'm simply going to leave the setup like that. Aldans up front, stock rear.
Inexpensive lowering and very satisfied ride performace.
Jeff