After a quick look, I'd rank from best-to-worst
- Aspen/Snowmass
- Big Sky/ Big Mountain
- Telluride / Purgatory
Aspen/Snowmass seems to have the largest number of things going for it
- Ski-in/Ski-out condos on snowmass
- Tons of terrain, all with same lift ticket
- Nightlife and things to do in Aspen if people want to chill for a day (or if there's bad conditions).
- No need to rent an SUV, just use buses. Airport is very close.
Potential downsides are it could be the most expensive, may be large crowds, and it may be harder to keep the group together due to the sprawl.
Big Sky/ Big Mountain look great for skiing, but pretty bad for other things to do. Last year they didn't get much snow, so its worth worrying about. It looks like the hardest place to get to as well.
Telluride looks good for advanced/experts, but reviews seem to say fairly moguly and less good for cruising. Purgatory appears better for cruising, but the lift tickets don't appear to be exchangeable between the two mountains.
Thanks for starting the ball rolling again,
Bagel