I just flew LAX-IAD this weekend on the red-eye. Sat 1J on the 763 and had no real problem sleeping. Propped my feet up on the bulkhead wall, reclined, brought an additional pillow and propped it against the window, and woke up right when we landed.
But definitely like others have said above, if you can swing a p.s. flight and and get into C...I can definitely sleep like a baby on that!