So I ended up getting the 6D for this lens and I've loved the combination of high ISO performance plus the versatility of the 28-300. It's been great for portraits and landscapes and whatever I run into travelling. One of the 6D's limitations is it's sports performance but I found that it can do pretty well in the right circumstances! Plus, again, the range of the 28-300 is hard to beat.
And at 300mm