Sniper258 wrote in post #14275336
I Believe the person behind the camera can produce better photos with better equipment. As he mentioned, he is a casual photographer and 5d 2 with 24-105 will serve him very well.
The person behind the camera can indeed produce better photos with better equipment, but "better" has to include all attributes of the camera, not just the sensor size.
As I mentioned before, the primary difference between modern crop cameras and modern full frame cameras is depth of field control. Everything else is a function of ever-improving technology. The 7D's noise performance is now at least equal to that of the 5D classic (and even better at extreme ISOs, most especially because the 7D doesn't exhibit the horizontal banding that the 5D classic does under those circumstances) and is capable of outresolving the 5D classic (with sufficiently good lenses). It may even be equivalent in terms of low ISO creamy smooth tones with proper postprocessing and downsizing to match the 5D's resolution.
All of which is to say that technology has improved to the point where the gap between the 5D classic's full frame capabilities and modern crop capabilities has been essentially eliminated, except for one important thing: depth of field control.
Depth of field control is the only advantage that you'll permanently have by going full frame. Everything else is an advantage that disappears with time and technology.
When putting the 5D2 up against the 7D, it's important to note that the 7D wins in every department unrelated to the sensor. It is faster, has better autofocus, has 100% viewfinder coverage (the usefulness of that is not to be underestimated), and lots of other features that make getting the shot easier.
The 7D is, simply, a better camera. While the 5D2 and 24-105L will serve the OP very nicely, the 7D will serve him better unless he needs the depth of field control of full frame, or needs that extra, but marginal, improvement in image quality.