Upload & Sell: Off
I had both a 50D, & 7D; sold 50D and bought a second 7D, but my decision was much about lenses & budget.
I would have bought a 5D for Landscapes, to pair with my 7D, but I had sold my Wide Angle FF Zoom, & bought an EFS 10-22 for the APS-C bodies; so "upgrading " to a 5D for Landscapes, though a good idea, would have required the purchase of 24-105L or equivalent, which was out of budget for me, at the time.
As to "reach", & I A Focus accuracy, it's down to the 7D, or 1D-4.
Depends on what lenses you have, can afford to get, and care to tote.