I too recommend Tire Rack's web site as a repository for consideration based
on my experience. I have no ties to Tire Rack.
My situation was:
1. '03 325i with 33K miles in Nov/Dec 2005 with worn Continental TouringContacts that I felt were approaching unsafe to drive in Chicago weather.
2. I searched the web for tire info. There were a few somewhat comprehensive
sites, of which, Tire Rack was one.
3. I decided that I wanted to try tires that handled better in wet, dry and snow than my original tires.
Decision
1. While I originally wanted to try Continental Extreme Contacts since they appeared to review well and be reasonably priced, they were back ordered
for over one month at many places that I called.
2. I decided to go for the Pirelli P Zero Nero tires. I ordered them from Tire Rack
and they were shipped within one week even though they were clearly
very busy.
My experience
1. Between Dec '05 and March '06, I've logged more than 2K miles on them.
2. They are very quiet compared to the original OEM tires; this is consistent with the Tire Rack reviews.
3. They appear to handle very well in the wet, dry, and the Chicago snow that we've had this year. On the other hand, the tires are pretty new and should handle better than my old tires.
In short, at this point, I'm not disappointed and the Tire Rack site results seem consistent with my experience to date.
Best of luck in your tire search.