Hey Durwood,

Are you looking for a wide or an ultra wide? If you want an ultra wide, I suggest the Sigma 15-30. It is an awesome lens for the money. The only gripe I had with it was the fact that the motor was a bit slow. It was very sharp - I think sharper than my 16-35 F2.8. The price is probably about $500.00.

If you are looking for something not that wide, I suggest the Tamron 28-75. For about 400 bucks, it is considered to be one of the finest 3rd party constant aperture lenses on the market.

James