Bilstein Comforts will likely suit you; the HDs are considerably stiffer than the Comforts, and since they won't match the front the car will likely "porpoise", meaning the front's bouncier than the back.
I put HDs in my '92 300D, but I changed all 4 struts/shocks.
"If everything seems under control, you're simply not going fast enough" --Mario Andretti
1995 E500 street car
1986 Porsche 944 Turbo S track car