Dorlee I have dined at Guy Savoy a couple of times and the meals were not memorable. However, every meal I have had at Taillevent has been memorable. I also think that their service is very warm and dignified. A few years ago, the owners of Tailllevent opened a wonderful bistro ( or brasserie; I always confuse the two). http://www.taillevent.com/english/angle/angle.html
The food was memorable, the ambiance was warm and inviting and, best of all, Taillevent, with little fanfare, insists, that its staff rotate between the high-end restaurant (Taillevent) and the lower-end (L'angle du Faubourg). Knowing you and some of your travel partners, I very much recommend this restaurant. Truly, you will not be disappointed. Indeed, you will love it.