Rhinebeck, New York - Beekman Arms
Also, the Tarrytown House or the Castle in Westchester County.
Also, Mohonk and I believe the Emerson Inn and Spa which was closed to fire a couple years back has been restored since the beg. of this year.
Also Cold Springs New York, great outdoor activities and some nice lodging near it - Garrison Inn and the Cromwell. Also if you are looking for a B&B the Kittleman's House.
All of the above are within 1.5 hours. All are four stars.