We stayed just outside Lorient at a b and b in Lomener, 10 minutes from the airport, same place for the week last time. To be honest, think if I was doing it again, I would stay maybe a night or two in different places as Brittany was much bigger than I imagined and roads are great, but never got seeing all I wanted to see. Maybe consider doing a circle starting west from Lorient, towards Quimper, Brest, then the north coast and towards the Normandy border and back again by Vannes towards Lorient for the flight home? Lovely places everywhere, medieval type towns and villages. Some when we saw them made us want to stay longer but couldn't as we had booked the full week in Lorient. Depends on how you are fixed really. If you are free to tour a bit more, don't stay the full week. Lorient itself has little to offer tourist wise but is a great gateway.