It does depend on your driving conditions. I use studded winter tires on the C230, and love them. We often have terrible city drinving conditions, and I frequent the mountains in the winter.
The noise is greatest at highway speed on dry pavement, but certainly not unbearable. Around town I barely notice at all.
I am running the Kuhmo KW-11 in studded form on the C230 and non-studded on the 626, and they are the equal of the WS-50 BLizzaks on the Outback, studded or no. They're cheap, too.
1998 C230 "Black Betty"