I already have a 50mm prime which I love! However I do need the versatility of a zoom for the type of shooting I do. I'm planning in going full frame in a year and a half so I don't see the point in getting an efs lens now! But thanks for the advice
In terms of the 15-85mm not being sharp I have worked it out. For some reason he decided to shoot most of the photos at f/32 why I don't know! But according to the reviews at this aperture the lens is extremely soft! I have no doubt it is a fantastic lens though!