I live in the condo canyon on Sheridan on the top floor of one of the high rise.
If your windows/sliding glass doors are shut you don't get much noise except the wind on very windy days.
If your windows/doors are open you can hear everything, including the El, traffice, sirens, horns, etc...
Hope that helps & good luck!
Never underestimate triple glazed windows if installed properly, they are awesome too.