Tranquil B&B near Loches
From personal experience I can say that La Bihourderie is a perfect location to tour the area south of Amboise. Naomi is a perfect host with excellent knowledge of what to see and when. Her advise on which chateaux to visit, the sequence and other places of interest was invaluable. The rooms share a lounge and kitchen area so guests have access to a patio, tea and coffee facilities which are excellent after a long day sightseeing. Breakfast is hearty and will keep you going for hours.
In conclusion I would say that if you prefer a tranquil rural setting as a base for touring the area, then La Bihourderie is about as close to perfection as you can get.