Hey thanks so much for your kind comments!
I modeled everything and used a subdivision surface to get the beveled edges. Probably why it took me so long lol.
I really didn't mess with any of the UHD settings. The only corona setting I really changed was setting it to Animation, and not Still Frame.
As far as the DOF goes, I actually rendered out a Position pass for every frame, but didn't end up using it lol. It would have taken a lot more time than I had, so I just added an adjustment layer in After Effects with a blur effect on it, and masked that layer so that it only effected the edges.
Render times were roughly 3-4 minutes a frame. However, that's on my 2012 MacBook Pro lol. I ended up using Pixel Plow to render the entire animation.
Matt