The 5d3 is a great camera, you keep complaining about sharpness, Canon came right out and said " we intentionally have made the files soft to allow the user to sharpen as much as they like" I use CS5 and have had great results in both noise and sharpness. I tried uploading the canon disc to my mac laptop and it wouldnt take, it would though on the newer imac, both units are Intel, go figure.
I recently shot a night job at 5000 asa, all action, car chases at night on the Vegas strip using the 24-105 and 16-35, sometimes with a pola and some without. My biggest complaint.... The Live View button. Its in the worst possible place. I am shooting action with a sport finder, so I've removed the plastic eye piece, while shooting I quickly change from vertical to horizontal, with and without the sport finder, when shooting while looking thru the finder my face was constantly pushing against the Live View button, I didn't know what was happening, the camera was freezing up, the screen went black, I was losing valuable shots, until I realized what was happening.... This was very annoying to say the least, aside from the focus points I couldn't see, at least on the 5d2 I always knew my point of focus was, other than this we got a great little camera for a fraction of the 1d mk4, and the X to come.