I've voted subzero - a hardcore track-focused version of any car is cool in my book - and when this car is made in Maranello, has one of the finest sounds from it's gorgeous V8 engine, and the supercool italian stripe across the body - I can't give this car no less than subzero!
After F355 I didn't like f360 but challenge stradale is one of the best ferrari made in last 10 years. But still this car is More than cool less than subzero for me.