Guys, come on!!!
The 5D without mark is an excellent camera. Sure, newer cameras have more megapixels, but the 13MP do deliver excellent image quality. (Don't judge it on the display, though, 'cos this is horrible. Judge it on PC screen.) Dynamic Range is very good as well.
I regularly do prints in 50x70cm and they come out very nicely.
High ISO is still better than on any APS-C, for sure. No banding until ISO 1600, perhaps a bit at ISO H (=3200).
Prepare for a decent amount of sensor cleaning, however.
I'm confident the 5D it will become your first body and the 60D your spare second one. ;-)