I just installed a set of Michelin Primacy MXV4 in the stock size 235/55HR17. They have a 60,000 mile projected life (treadwear of 620). They are better than the Bridgestones that our 2005 X3 3.0i came with. They are quiet and seem to handle as well as, if not better than, the Bridgestones. They aren't the cheapest tire available but aren't the most expensive either. The best price I found was at Costco.

__________________
Scott

2005 X3, Premium, Sirius (Self Installed), Xenons