Personally, I wouldn't choose anywhere inside the park. If you have your heart set on somewhere inside though, I guess I would pick CRT. But the decision is really only based on atmosphere as we thought the food was just okay. I would NOT go to Tony's. Crystal Palace or The Plaza, maybe.
What I would do would be to leave the park and either go to California Grill in the Contemporary (atmosphere and food are excellent) or to the Grand Floridian for Narcoossee's. Both of those being two TS credits and a little more expensive, if you need somewhere either one credit or less expensive, I would choose The Wave in the Contemporary or Kona Cafe in the Poly.
Good luck with your choice!