As a big fan of the best in the Nikon line, and fanatic when it comes to the best image availiable, I'm not even going to consider an EDG. They are not built as tough as the LX, that's odvious. The LX, on the other hand, has passed Barsness's "alaskan guide tests" as far as toughness. That's good enough for me.
The other is the reduction in weight. Again, not me. The Zeiss FL, and the Leica Ultravid are reported by many to be, maybe, a hair better than the LX. They are also much lighter, as apparently the new EDG will be. Not for me. I don't want anything lighter than my 25.5 oz. 8X32 LX. Too much image shake for me. E