I think the most distinctive aspect of W123's are the round "bug-like" headlights.
So, I believe if you want Euro's, the round is the best way to go, so nice job. Now, having said that, I went and looked at your car in your gallery, and I must say I think it looks better with the US spec. lights. But I bet you sure can see better at night now.......
**edit**
and just to clarify my insignificant opinion, I think W116's and W126's look better with the rectangular Euros than the stock headlight assy's.........