I shoot proffessionally and the 5dmk3 is my work camera. The new 5d 50mp camera is something I am considering as my images could get enlarged to the point that I need it.
That said. think about the largest image you will create? Then buy appropriately. If you are looking for a top quality camera look at the 7dmk2. It has the same focusing system of the 5d. Also the 7 is a crop sensor and you will get that zoom you are used to. That said some great deals on used 5dmk3s are popping up because folks are upgrading. Nothing wrong with a good used camera esspecially if it is being replaced by an upgrade.
as mentioned the rebel 5 is a good choice too.
