I love driving in France especially on the west coast usually starting at the Quiberon peninsular and down towards La Rochelle and Biarritz there are some superb roads, but the Nurburgring is something else! we have stayed in Koblenz a couple of times which is pretty close to the ring and well worth a visit.
We have also stayed in the villages right on the rings door step Breidscheid, Adenau and Nürburg if you really are selling your Boxster the Ring should be on your bucket list!
this is the entrance at Breidscheid the Hotel we stayed at is in the background breakfast on the balcony with great views of the track.
just do it