Thanks Ladies! I think I'm done for rings now! Tiffany's shared prong ring is just to die for! I think the 3mm is just wide enough without over powering the e-ring when I wear the two on their own.
It's beautiful! I actually love the shot of it by itself!
I would be careful wearing it right next to your (gorgeous) e-ring though, as I've heard bad things about shared prong settings scratching up e-ring bands/prongs.