Avoriaz vs. Val d`Isère vs. Pragelato Vialattea

Hi guys,
I am planning to ski in Europe with a group of friends in January 2016. Plans are to stay in a Club Med resort, due to its facilities and ski lessons (we have been to one in St. Moritz and enjoyed it; we also know Chamonix, but not the Club Med). The group shall be composed of 8-10 men, beginners and intermediate level skiers and snowboarders, in their late 30's, interested in good skiing and some nightlife. An easy to reach place from an airport is a must, as we will be coming from Brazil.
We were thinking in one of these three: Avoriaz, Val d`Isère, Pragelato Vialattea. Which one do you think would suit us the best?
Thanks a lot,
gus

Where do you arrive in Europe?
Which airport you come to would make a difference.
I have been to the Club Med in Tignes (next to Val D'Isere) and in Serre Chevalier.
One thing to consider is resort connectivity and accessibility with the Club Med format of returning to the Hotel for lunch.

Avoriaz is closest to Geneva and could work well.
Les Arcs (with two Club Meds in Arc 2000 and Peisey nancroix) may be worth considering.

Club Med in Tignes is better placed for the rest of the town for night life than Val D'Isere - if you want to leave the hotel and free beer!

If you plan to take advantage of the ski lessons for either mornings or all day then the hotel position becomes even more important.

Thanks for your answer. We can arrive anywhere in Europe (Geneva, Milan, etc).
Avoriaz was strongly recommended due to the proximity to Geneva and to the fact of being a ski in / ski out resort.
We are thinking in going on January 17th, for a week. As far as snow is concerned, is it a good time or should we postpone the trip a little bit to try to get a better snow?
Thanks again,
gus

I wouldn't go after 30th Jan as this gets into the main holiday period. So more expensive and resorts get very busy.
You could delay until early March if you felt like it. Warmer and more chance of sunny days.
If it were me I would choose a hotel you like the look off, in a resort you fancy and go from there.
Main thing for me being the actual location of the Club Med Hotel in the chosen resort. Some are a bit remote from the resort and even lifts (Val D'Isere for example - can be tricky to get back to for less confident skiers, Tignes much more straight forward)