moltengold wrote in post #14397877
5D2 or 5Dc or 5D3
means you need some L lenses
need more spending money
the 7D gives you a good reach
5D for Landscapes photos and professional uses
but some people not spending more money
and they use the 5D with one lens like the 50mm 1.4 and they feel happy with its great image quality
its your choice
Actually I would argue that the 7D needs L glass due to its pixel density and needing very good resolving optics. The lesser lenses actually work very well on the FF bodies. For example the 28-135 isn't anything special on a crop, especially an 18mpx crop, however put on a FF it produces wonderful images.
@OP, I agree with Woolburr. If you are not able to get shots you like with your current setup, determine what the factor is, and decide if selling off 2 of your lenses and the 7D is worth the effort to go out and buy a used 5D2 and new glass.