Oh and let us not forget that many of the airlines are having business class sales to Europe from many cities Thanksgiving week and the following week as well. These advance purchase fares are available for about $1500 -$2000 from just about any city in the U.S. Seats are limited and these fares require advance purchase.
Another option would be to buy more than one economy seat and then use the extra seat or two to stretch out.
Good Luck!