I shoot sports with my 7D and landscapes/cityscapes with my 5D2. It seems that carry both on any shoot makes little sense especially with the extra weight. I'm considering an SX40 or SX50 to fit that role. Ideally a 1DX or 1D4 as the primary with the 5D2 and 7D as secondary is best but not at 20x the expense. Any thoughts? I like the reach and fps of the SX50 but the SX40's larger aperture is appealing. Thanks for your opinions.