I like them, but I certainly would not use them with stock shocks/struts. You might be able to get away without aftermarket plates with these, but I wouldn't try it.
I love my C-springs. If you wanted anything stiffer than them, I would go to a coil-over set-up.
I'm using Mach 1 shocks and struts and they match up great. I'm not running caster/camber plates, although I am finally going to get some here soon when I do a few upgrades.
If you're currently running a stock suspension, I would save up and get a bullitt or Mach1 kit that includes springs, shocks/struts and sometimes sway bars.
Pictures of my car can be seen by clicking the link my signature.
Dude! You car looks pretty dam good!! It is the same exact color and top as mine but your paint looks alot shinier. Is that a new paint job? Also, I like the wheels on that car.
heres a pic of mine with the C springs installed... it lowered the front more than I thought, the rear is still kinda high but i dont really mind a raked look.