Glad you got 2 / 3 that you likeI bought a bottle of Rive Gauche a few months ago, and have to agree on it 'oozing class.' Id suggest trying Egoiste, if you can find it. Got a bottle of this yesterday, and it oozes class AND romance. Spices in the top, then rose, and finally sandalwood and vanilla after an hour or two. Cant wait to properly try some more Chanels...
If you want the 'basis' of GIT and BdP, then try Davidoff Cool Water and CK Obsession for men respectively.
Im trying to choose between Envy, Terre d'Hermes and Kenzo Air as my next purchase... But its going to have to wait til I finish a bottle of something!