Kopaonik ski resort (Serbia) - the best money/value ratio

Hello everyone, we are a group of friends planning a trip to Serbia for celebrating New Year and skiing in Balkan's most famous ski resort Kopaonik. We plan to spend 4 nights in Belgrade (with day trip to city of Novi Sad) and 5 nights on Kopaonik, skiing and having fun. We already have accommodation organized and a minivan for moving around ( and for transfers, transport between cities, day trips, visiting some natural hot springs or just buying beer in the shop :D). We have few places available and we share expenses so anyone interested feel free to ask for more info if needed...and join our international cheerful company :D!