Virtually all of Vermont is top notch and you will have a fine time.
Mostly because no one else has, I'll suggest a 'commuter' trip to Whiteface/Lake Placid.
Fly into Albany, NY and rent a car and drive 110 miles north on the interstate and take a left (Exit 30). This puts you in the 'Olympic Region' of the Adirondasks. It's about 30 miles to LP or 25 to WF. There may be direct flight service into Albany via Southwest or Jet Blue.
You will have a vast array of lodging and dinning and shopping in Lake Placid and in the surrounding towns. http://www.lakeplacid.com/ The
key towns besides Lake Placid (drink UBU Ale at LP brewpub) would be Saranac Lake (eat at Casa Del Sol), Wilmington (home of whiteface), and Jay (artists haven).
You can spend a great deal of money in VT as well as in Lake Placid but in NY, the lift ticket prices are notably less expensive.
The terrain at Whiteface is not as vast as the larger VT areas you mentioned, but it'll suit the intermediate family and provide lots of opportunity to expand.
Besides NY and VT, consider eastern Canada. Mt. Tremblant is north of Montreal and there are several areas outside of Quebec City. Knowing Francais helps.
...Stowe would be my first choice if money were no object. My wife gushes over the place and she has never forgotten the weekend we stayed at the Trapp family lodge (Sound of Music).
Finally, I presume you will be skiing with your family and that you will be skiing the February school break. There will be very few deals on lift tickets, save one...
If any of your kids are in 4th grade, get a kids ski free passport sponsored by the ski area association of ny. Your 4th grader can ski at any NY area for free up to three times. Most of the NY areas have not blacked out the Feb break in past years.
VT areas offer an equivalent passport for 5th graders, but the Feb break has been blacked out in the past at all areas.
Holy crap... I've gone on too long.
Welcome to the East!!! Where skiers are uniformly cool and relaxed because skiing is too much of a hassle for angry uptight city dwellers to bother.