The local camera shop guy told me the best all around everyday lens is a 18-200mm. I have a Canon Rebel XS with the standard 18-55mm and a Quantaray 70-300mm.
Would the 18-200 be a good investment? He also said the Sigma lens was better then the Canon. I see where this lens is offered in two styles, the DC and the OS. Is the optical stabilization that big a deal and worth the extra dollars?
Thanks.

