I think Salamander is the nicest too - but pricey. Haven't done Nemacolin but I love Bedford Springs. It's old but well renovated and the spa is one of my all time favorites - ranked up there with the Broadmoor in Colorado Springs and the one in the Lhao Lhao in Bariloche

Homestead is okay but not as quiet & nice as Bedford. Nemacolin...meh.