I've also looked at many -too many- samples from both of these bodies; funny how everyone's eyes perceives differently but to mine, I like the contrast, color, and depth coming from both the 5D III -and even the II (lower ISOs)- over the 6D (though I do see the 6D's super-clean at jacked ISOs). However, I've also handled both recently and do like the 6D in the hand better (felt closer to its 60D brethren). But, the 5D III's components just felt and looked more high-quality overall and was not too heavy or big (something I was concerned about having shot with the 60D last few years). I think the 5D III will provide good balance with the heavier lenses. In the end, I'm going to save for the 5D III as I'll use it for plenty of moving objects which its auto-focus system is more prime for.