Love New York and been there a lot since I was 17 and have a close friend from there but a lot has changed since then.
Midtown good to stay in. Tour bus for good views round city. You can get a museum pass which is good value.
Ellen’s Stardust Diner is good fun as the waitstaff sing.
Radio city music hall and Rockefeller Center (top of the Rock) both good for views and performances. Try to see a Broadway show too.
Staten Island ferry also good.
If you can afford it do a helicopter flight or cruise around the harbour.
One thing I also did was the catacombs of St Patrick’s Cathedral.
If you like roller skating go to Central Park to do this, you can hire them.
The restaurants can change a lot but accordingly to a friend who lives there Korean food is trendy now and Kochi and Atoboy are two of the best.
You’ll have a whole year to prepare so you can research a lot.
If you like walking then schedule that in, it’s nice to walk through different areas stopping off for coffee/at a diner etc.
Definitely prebook museums etc as queues can be a nightmare.
Factor in shopping like Macy’s, Saks 5th Avenue, Tiffany’s, FAO Schwarz etc.
If you both fancy it you can do Washington DC in a day too.