What are you looking to do with the car??? I would get the z06 over the supra. I dont see a very good reason to get the (toy) unless you wanna go too fast and too furious
I'd say nay to the supra unless it was the early 90's body style which is my fav. It was the vehicle that got me into this world of sports cars. I was living in central america when I drove it and fell in love with the 6 cyl because of the way it sounded.
Both cars would be awesome. Neither would disappoint. The supra is far more rare but I had a buddy with an MKIV, that thing was mean and very reliable, but damn expensive to mod. Seems like every little part cost an arm and a leg. If you have the money they sure can make some power. Tough choice.