David, if you've moved on from actually owning a Z8, then a Limited should offer enough performance. But if you're still into trashing nearly every other car that you meet at all the traffic lights then you may want a SRT6.
I'm 6'2" and fit in a coupe, so a Roadster should work out for ya.
Of all the cars that you mentioned (on your short list) personally I feel the Crossfire offers the most "Character".
If for no other reason, it's the best sports car "bargain" on the planet.