So, I'm flying NRT-SFO - in coach. And most of the seats are taken - literally no aisle or window seats available - only middle seats (both in seatmap & over the phone). I'm going to keep checking back in hopes that someone with a good seat has an upgrade clear or something. I'm a 1k, so I'm eligible for E+. Looking at the seatmap of my plane - http://www.seatguru.com/airlines/United_Airlines/United_Airlines_Boeing_747-400_B.php - am I better off in 33B or 33J OR 45B or 45J. 21E & some other E+ "E" and "F" middle seats are open as well. 45B/J are green on SeatGuru - 33B/J are yellow - but the descriptions are essentially the same. I'm 6"1' if that makes any difference. I really want an aisle seat. Any suggestions to get an E+ aisle would be appreciated!