GF RPC is really the ultimate. The food offerings are great, the atmosphere is lovely with live music floating up from below, the lounge is spacious and the CM's are friendly and helpful.
Second choice is Poly CL due to the beautiful view from the lounge.
In the Epcot area, you cannot beat the CL at the BWI. The CM's there are so friendly and helpful. They have to be the best in WDW. They make a stay in BWI CL feel like home, only better. It is a great place to stay!
All three of these are prime CL experiences. All CLs are good, but these three each have something truly special to recommend them. A stay in any of these is spectacular. However, the best of the best is the GF RPC. Get a TPV room and it is awesome!