One can get a $100 gift card for 10000 points, so that's one cent per point. Any redemption should do better than that, I think.
A 3000 points one-way on regional coach class BOS-WAS is probably a good redemption. It runs about 3 cents per point.
A 10500 points one-way on Acela first class BOS-WAS is probably a good redemption. Also about 3 cents per point.
I haven't looked into the long-distance sleeper car. I think that's probably also a good value.