The best of the hotels in Klosters is arguably the Silvretta Parkhotel, one of half-a-dozen 4 star hotels in the village and designed as four adjoining Swiss chalets in Klosters Platz, a very short walk from the Gotschna cable car. It has a great spa, excellent children’s facilities, its own nightclub and a choice of first rate restaurants and bars.
The smaller and traditional Hotel Steinbock might be more to your taste however. It has a similar range of facilities, is also close to the GFotschna cable car base station and also the ski bus stop if heading to Madrisa instead.
And the 3 star Hotel Sport is a good choice too, a little further out on the edge of the village but has a pool amongst its impressive list of amenities with an affordable price tag.