Surprise Long Weekend Getaway with the Wife

So my wife is finishing up her Master’s on March 15th, and I’m trying to surprise her with a long weekend for the 2 of us (3 nights, as we have two kids, and that’s as long as I can rig up childcare without telling her about it) as a way of showing my appreciation for all her hard work. My ideal travel dates are the last weekend of March (28th-31st). Travel has to be domestic because her passport is expired and she obviously can’t get it renewed without throwing up red flags, plus not having enough time at this point.

We live in Nashville, and I’m thinking of the following places:
NYC - she’s been before, but I haven’t, and she keeps telling me we need to go together
Vegas - I’ve been plenty of times, but never with her. She has never been. Same as NYC, she says we need to go together soon
Seattle - neither of us has been, both want to go.
San Diego - same as Seattle

I’m leaning towards NYC, but not sure 3 days is really enough to take it in. Does the travel board have an opinion on which destination is best for this trip and then suggestions of things to do while there to maximize the trip?