I have the same problem with the back end of the car jumping around ridiculously over bumps. No squeaking or clunking, though, so I feel blessed for that. I have totally decided to get H&R springs, and I think I want Bilstein struts (can't justify the $ for the Konis), so I've been looking around, and when I went to SP Motorsports, I noticed the "kit price" is no lower than if you add up the individual prices ($709). I then called, talked to Joe @ SP Motorsports. He said something about their supplier raising the prices, and the individual prices didn't get adjusted, but the kit prices did. Yeah right!

He then recommended that I get the BAT Euro struts w/ H&R springs for $635. Also, I called a highly recommended shop for pricing on the installation. This is the same shop that put the tires on my mom's Vette. They quoted me a ballpark figure of (sit down if you have heart problems) ~$500!?!

That is for install of struts & springs, and a 4- wheel align. Not to mention that I'll be getting some Kumho Ecsta Supra 712's from Tire Rack, and need to have those installed, too. So, ~$1500 for springs , struts, and tires , out the door? I'll need to stop at a convenience store on the way, so I can get some Vaseline...
Demon, where did you get your springs & struts?

I'm sure I can find cheaper labor, the guy @ Performance Alignment said they were charging $70 / hr.

It burns me up, though, cause I know they do stellar work.