Thank you all for your responses and suggestions. My wife and I ended up at the Eiffel Tower Restaurant and had a very enjoyable experience there. She liked the little table we had along the windows overlooking the Bellagio fountains, and we thought the service was just right (a nice balance between fun and casual vs stuffy and pretentious). The one thing I feared most was that the food wouldn't live up to the price, and that it would be more of a tourist trap than a good dining experience. Thankfully, I didn't find that to be the case.
For those of you who care, we had:
Crispy Farmstead Artisanal Camembert, Almond Apricot Petite Salad 14.95
Eiffel Tower Summer Salad, Shaved Vegetables, Banyuls Vinaigrette 16.95
Filet of Sea Bass, Fingerlings, Double Smoked Bacon, Crispy Potato, Petit Mache 42.95
Individual Eiffel Tower Beef Wellington, Sautéed Snap Peas 54.95
Classic Potato Gratin 8.95
We also had (without the benefit of having these menus available to me now) some sort of pear martini for the wife, a caramel souffle, a chocolate hazelnut case, a small chocolate mousse (compliments of the house), some petit fours, and coffee.
I think our total bill for the above, plus tax and grat, came to about $240.
The highlight for me was the beef wellington. It's one of my favourite meals, and it's hard to find a restaurant that does them, let alone one that does them well. Mine, alone, was worth the price of admission. I was also impressed by my wife's sea bass. And, we both were surprised at the large size of the entree portions. In any case, I'd say we left very satisfied, a little over stuffed, and quite happy. 
Cheers,
Nathan
···
On 06 Aug 2009, at 18:23, jsmeltze wrote:
--- In vpFREE@yahoogroups.com, "Nathan O. Roemer" <public@...> wrote:
>
> My wife and I are celebrating our 5th anniversary this weekend. We
> were engaged in Paris, so I wanted to take her to one of these two
> restaurants for dinner. I've not been to either one. Can anyone
> offer any feedback on either or both in terms of how they compare/
> contrast?
>
> Thanks!!
>
My wife and I just came back from Vegas celebrating 18 years! Congrats on 5. We prefer nice food in a casual atmosphere and Mon Ami Gabi was perfect as we sat on the patio overlooking the Bellagio Fountains. They do not take reservations for the outside dining,so we got there around 5 and got a table right on the rail overlooking the street and fountains. Perfect! Only challenge is that it can get hot. Around 6 PM, the sun hides behind the Bellagio and that's when the evening was perfect.
Food was good, not great. The filet Mignon was the better of the two meals. Service outstanding.
- jeff