Are all of your products the same size/have the same shipping cost?

If so, then having a standard class 2 zone setup as Kobra said would work.

If each of your products costs different amounts to ship, then it will fast become a nightmare. I try to keep my shipping cost setup simple & at about the cost that 90% of cases will be. The other 10% I win or lose a little on.

Then I spend less time shipping each package (they go via one of two ways, meaning I have less chance to bugger that up), and less time maintaining my shipping tables.

You have 4 shipping options that range from 5-6, which seems to me that they are all pretty close to the same price. I would pick one & just use that.

Not sure what your market is telling you though...