Recommendations for quiet resort with excellent spa?

I%26#39;m planning a trip to Nevada for a week in mid June and have been doing some internet research but need some suggestions.

I%26#39;m looking for a quiet resort to stay at for a week which has a great spa, hiking, yoga or mediation classes that will not break the bank. I would be travelling on my own.

I%26#39;ve looked at the prices for the commonly quoted resorts with spas and they seem crazy. I could go to Jamaica to an all inclusive twice for the price of a one week holiday! I certainly would like to stay at a nice hotel but not for $4000 a week!

I%26#39;m starting to think that rather than looking for a place that specializes in these activities, it may be cheaper to book a room at a nice resort and then add on the activities a la cart?

Any suggestions?