What are you looking for? big resorts, big scenery, big aprés, long runs? Only groomers, need a park, want good SC?
Austria is known for being pretty cheap, there are some threads in the Euro subforum on Austrian resorts.
You'll find a comprehensive list of European resorts here: bergfex
On a sidenote: xmas can be risky in terms of good snowconditions. Ok for groomers, but if you want to ride SC as well, it really depends on the year... last year, it was awful till mid Jan. If xmas is your fixed time slot, I'd look for resorts with high altitude (more in the western area, France and Switzerland, where mtns are higher). Look for a resort having runs at > 2500m elevation: You're on the saver side if it'll be a bad season start again and won't have to ride rocks n dirt.
My favorites in CH are
- Zermatt (big in everything, also price): lifts up to 3900m elevation; runs with 2280m vert (7500ft)
- Andermatt (great SC selection): 2960m; 1520m vert (5000ft)
Pics of both are here: http://www.snowboardingforum.com/wes...-pow-alps.html
If you find a good package, Zermatt is a must see IMO. It's pricy... but the scenery is worth to spend a day or two there.