Since the new version of this lens is out cameta camera is selling these for DIRT CHEAP! Its a Sigma 24-60 f2.8. The new version of the lens is around 400 + on eBay. The only difference is that the new version has the silent focus motor which I could care less about. This lens isnt that loud at all. Its available for both canon and nikon for $219!!!!
Amazon.com: Sigma 24-60mm f/2.8 EX DG IF Aspherical Wide Angle Zoom Lens for Canon SLR Cameras: Electronics
Amazon.com: Sigma 24-60mm f/2.8 EX DG IF Aspherical Wide Angle Zoom Lens for Nikon SLR Cameras: Electronics