TK's Y seats in 777/330 are great compared to UA/LH etc. I prefer older aircraft because the seats are more solid (someone big sat in front of me and his seat reclined on a 12 hours flight on a A380).

Avoid 787 as other poster said, they are the worst and don't take any aisle seat close to the back. Trolleys and people bumped into my head constantly throughout my 10 hours TATL flight.