For a first Disney Trip I wouldn't suggest the overall best restaurants, simply because you don't know how to move around just yet.
I would suggest:
-Crystal Palace in MK.
-Coral Reef, Chefs de France or Teppan Edo in Epcot.
-Hollywood and Vine in HS.
-Tusker House in AK.
Favorite Restaurants (MUST reserve 6 months in advance).
-Ohana in Polynesian Resort.
-Cinderella's Royal Buffet (Worth 2 points, MUST make reservations 6 months in advance, tho and CALL since it's with Dining Plan)
-Chef Mickey in Contemporary Resort.
-Le Cellier (Worth 2 points)
-Garden Grill
Have fun!