Bilstein is the only way to go, Koni's are for Porsches and ricers. I have HD's on my coupe and Comforts on my wife's 300SD and we are both happy.
The best prices, good advice and service are from Phil, here on MBShop, if he can't get them, try Adsitco.

__________________
Houston, Texas
1984 300CD 235K miles, Elvira, one owner
1987 300TD 180K miles
1974 TR6 78K miles Sarah Jane, one owner
OBK #27