I can't say which location would be best, but I can recommend a very very nice place to stay in Bayeux. It is a detached (freestanding) cottage, but the owners also offer several nice B&B rooms on the same property. The rates are quite reasonable (in Sept the cottage - 3 bedrooms - rents for 420 Euros per week) and the B&B rooms are 75 euros per night for 2 people - less than most hotels and much cozier. See the website at http://www.relaisdelaure.com/
The owners, Rene and Christine are very friendly and hospitable. The property is 500 years old, but all modernized - about a mile from major grocery store and about 1.5 to 2 miles to center of Bayeux (cathedral).
We stayed in the cottage for 3 weeks and explored most of Normandy - with side trips to Mont St Michel (90 mins drive from Bayeux) and Caen (20 mins drive from Bayeux), among others.
A fun, short trip (17 miles) was Chateau Balleroy - owned by Malcolm Forbes family - with its 17th century chateau AND hot air ballon museum!
Terry & George