My first flight on a domestic 767 is Saturday DEN-ORD. I'm an aisle guy and all of the center seats are open except 5F. I was considering 2E or 2F, but SeatGuru says that these are the only two seats without EmPower.

Perhaps I should go with 3 or 4F? It's still not clear from this thread or from SeatGuru why the F column is better than the E column.