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.

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo