We stayed at WL during Christmas thre times, it is beautiful, don't forget to ask if they have anything special going on. One time we saw carolers. Very nice.
Also you can take a monorail trip to visit the Monorail resorts. Just hop on the boat to the Contemporary and start there.
We also went over to the Epcot resorts, they are very nice too. We went to Epcot, saw the resorts, lunched at ESPN, ended up at the Boardwalk, took a bus from Boardwalk to MK, then the boat back to WL. It was along day.
The mods are nice, but the deluxes are great.