Since owning my S550 GT, I personally don’t think I would go back so for me it was an easy poll, 19 GT and then a very easy 2nd is the Z06...however I would prefer a 2011-2013 as they sorted the valve/lifter issues that affected some 08-10 c6 Z06. Also, not a huge fan of the vette interior but the LS7 makes up for that.