Upload & Sell: Off
I guess I'm not that anal... so the hair-slitting differences in Quality between the NEX and Canon is more than than made up for the simplicity of a system camera.
I shoot m43... so I can't claim to be shooting the "best" of anything, but I like it and can be very happy with my results.
Frankly the current m43 cameras equal or surpass the stuff that Canon is putting out in their APS-C line these days, unless you are shooting the 1st generation m43 stuff you probably are getting IQ comparable to Canon's Rebels, or better if you have one of the new 16MP bodies. But the difference in IQ from NEX to Rebel, the IQ difference between a NEX-7 and a T4i is comparable to the difference between that NEX-7 and a 5DmIII in the other direction (in fact the NEX-7 and 5DmIII have the same DXOMark rating due to the NEX-7's DR advantage offsetting the 5D's high ISO advantage, the OM-D comes in midway between the Rebel T4i and the NEX-7 and 5DmIII at a rating of 71).
I should note that while I have my issues with the DXOMark tests, they do provide a rough guide of performance, especially when there's significant differences in the ratings, like the NEX-7's 33% higher rating as compared to the T4i
Canon's APS-C line is generally known for mushy detail, mediocre colour and heavy-handed application of NR. Their FF bodies are FAR better. Frankly I don't see much reason to buy a Canon APS-C DSLR aside from the 7D (whose video capability makes it a compelling choice for some applications). Better to buy a used 5D or 5DmII for a similar price.