Utah could pick Smart. But i think your top 5 is right. 
I find picking between Gordon and Vonleh to be very difficult, and would be happy with either one. 
Forced to make a choice today, i will go with Vonleh. Until the combine i was leaning towards Gordon, but Vonleh's scoring potential, rebounding ability and length have very literal high value. 
Gordon is more about athleticism, intangibles, and defense on the perimeter/high post.