I got the Ziex for $312 shipped to my door. Best budget tire in my opinion. When I got them mounted and balanced the shop had to remove all of the weights from my wheels, which means the tires are very well balanced (or they counter acted the rim balancing exactly).
A friend of mine used to work at Goodyear, and said the Nankang tires are the worst quality he has ever seen as far as balancing is concerned.
I think the Hankook tires are getting a bit better as far as quality. You're good to go with either one of those choices.