On ANZ 777-200ER, It's difinately not a good option to chose any seat in the last 4 rows. Your 65 row will be noisy, you will probably listening to crew talks during most time of your trip and people using toilets. Most importantly, the armrest for those rows at the back can not be fully lifted up, sometimes you may want to lift the armrest up to create more space between you and your fiance. Cheers.