My boss has a Cayman R which I drive pretty frequently back to back with my m3. Both of our leases are going to end at the same time and at first I thought for sure I'd buy out the m3, but the Cayman is growing on me very rapidly. Every time you throw it into a corner it just amazes me, plus much better gas mileage and much less common. Definitely doesn't have all the amenities of the m3, but still very easy to live with daily. Tough choice....
'00 M5 - Sold
'08 335i w/m3 conversion - Sold