This is one of the lenses I am coveting right now - Tamron's new image-stabilized 17-50mm f/2.8. The previous, non-VC version gets awesome marks in the user reviews here, I've had great results with my Tamron 28-75mm f/2.8 and my experience with Tamron's VC Vibration Compensation has been very good. Right now, I think this is one of the ultimate fast, standard zooms available for APS-C sensor DSLRs.