Between Leysin and Villars, we go to Les Diablerets and love it.
http://www.diablerets.ch/web/home.php
We prefer Les Meillerets side as there are two chairlifts to the top which is heaven for snowboarders. On the Isenau side there is a Gondola to the top although the runs are shorter and it is all tir-fesse (thingie you put between your legs to get up the hill) once you are up there. The exception is the run from the top of Isenau back to the Gondola start point but as you can imagine it can get busy there.
It is also easy to get to by train from Lausanne. Lausanne to Aigle and then the small local train to Les Diableret. If you get off the stop before Les Diablerets called Vers L'Eglise there is a small uncrowded ticket office there with a tir-fesse that connects with a T-bar to the top.
After your first visit keep the keycard you get as a skipass (and for which you pay a deposit). In all the Alpes Vaudoise stations
(http://www.alpes.ch/en/Destinations.3) you can then use these keycards to buy passes online and they are especially cheap the night before or the same day purchase. Unfortunately the different stations weren't connected by a central purchasing portal and you needed to register at each one but that is not a major hassle. Maybe this year it wil be centralised.
We'll see you up there this year.