Don't take this the wrong way...looks good and all but in my opinion they don't fit the aggressive look of the Durango. They look too 'elegant' for the D, maybe because of the amount of spokes or something. All that matters is that you like them and are happy with them.
I don't think they will make much difference. The weight difference is not noticeable, and the overall diameter of the new wheels/tires is exactly the same as the factory 17s it came with. That's also why I did not take it to the dealer to have it checked. The ride is the same, the only difference I can tell is that is seems to corner a little better. Probably due to the wider tire.
I think they look sweet. I was looking for an aftermarket wheel similar to that but couldn't find one so I went with the srt-10 replicas. I would have gone with those if they would have been available at the time. Wanna trade?