I would take the midyear, as the shark styling is just not to my liking. I remember when I was about 12 years old and I saw my first midyear Corvette. I thought that it was just about the coolest thing that I had ever seen. When the 1969 Corvette came out, I thought that they had absolutely ruined the Corvette. I have since come to appreciate the sharks, but the midyears still rank higher on the coolness scale. The sharks seem a bit cartoonish to me. Just my opinion, and you know what they say about opinions...
The big block would be pretty tempting, however.