How about a double-L option. This is what I had during my Digital Rebel days - 17-40mm F4L and 70-200mm F4L. Since you have a cropped sensor, the 17-40 is equivalent to 27mm-64mm which is excellent as a standard lens. You miss 40mm to 70mm which is equivalent to 64mm to 112mm which isn't too bad. You get F4 straight across the board and depending on final pricing, you may be able to pick up IS on the 70-200.