I wanted an SRT6, and decided on the coupe because of the added chassis rigidity the roof offers, comparable to a 911. If I'm going to get the high performance version, it was going to be the highest performance version! I don't know offhand about the Crossfire, but most coupe versions of cars are lighter than the drop-top, also.

Of course, I've got a Triumph Spitfire in the stable to take care of my topless jones!