[Pilot2519j]

My opinion is no. The 986-987 as well as the Cayman will out-handle the 911. Besides that it is a more drivable car. You don't have to worry of all the weight hanging over the rear tires as you turn. Given equal horsepower the cars would perform pretty even except in the real world of turns and curves, in that arena the Boxsters/Cayman will shine. The new RS-60 with 303 horses pushes the top speed of the 987 to over 170 mph. If the comparisons are cabriolet to Boxster then the performance advantage of the 911 diminishes. Considering the delta of the top speeds and 0-60 of both cars it is negligible and since in the US you cant drive like in the Autobahn then top speed is removed from the equation.
The Boxster has beautiful lines as well as the Cayman much more aesthetic than the 911 cabrio which looks like a rube goldberg sandwich. Those consumers( the perrier crowd) than have no knowledge of cars will opt for the 911 because of its bling. Those who know about cars and handling will opt for the Boxster and Cayman because of their bang.