We stopped over in St. Anton mid January and despite the fact that the weather was absolutely horrible (Raining at the bottom, dense clouds in the middle, and 20 knots of blowing snow at the top) the skiing was still amazing. The aspect of some of the major decents keept the snow stable and soft despite the vicious weather. On top of that, it had been close to four days since the last snow and with a little effort, freshies could still be found.
I've been to many places throughout Austria and St. Anton has by far the best off-piste of them all. Short, technical descents are accessable right off the lifts and bigger, steeper lines can be reached through easy traverses. To top it off, there are dozens of marked trouring routes and a backcountry thats so mind-numblingly large that its hard to even decide what line to ski.
The night life is every bit as epic as the skiing. If you have been to Europe skiing before you are probably familiar with the euro apres-ski scene fueled by crazy austian dance music, tight pants, and too much schnapps. This place has more of the feel of someplace out west in America: Beer, rock music, and a pleasing absence of spandex.
If steep lines and a wild nightlife is what you are after, St Anton will provide. They have a wonderful ski school, many family friendly hotels, and plenty of activities for kids and non-skiers. On top of that, the town is beautiful and is an easy drive to both Switzerland and Innsbruck.