The Cat and Custard Cup is down at the bottom of the hill from me - but tho I like it, if you really want something special, I would try one of these;
The Black Sheep Bistro - truly innovative (likes to do special things)
Riviera by the Fireside - outstanding, stuffy
Mr. Stox - they have special Christmast thing with Carolers in December, thru Christmas eve
The Cellar - call and see if they want to do something special, and they may have something planned or they might do it for you
La Vie En Rose - less than 10 miles away and they might have an X-mas special.
I will probably be out that night, at one of these, but not the Cat!