Treat!
I hope you get decent seats... Who you watching? I was out there earlier this year. Few points I will say..
Book your transport from the hotel early, we ended up paying 90$ for a taxi to Newark because we didn't book in advance..
Don't go to the comic strip, the touts do tickets cheap, but you turn up and you have to drink a min of $20 per person and the drinks are mega expensive too.

You will also get to see one of the finest netminders in the world..

Although he aint no Tim Thomas..
My personal opinion is this:
Don't bother with:
Empire state or Museum of Sex. Not worth the money
Do break the island down into sections and not try and cram it all in.
It is VERY EXPENSIVE.. We ate breakfast at one little diner, I had an omlette and OJ and missus had Bacon and Cream Cheese bagel with coffee and it came to 54$.
Check out Century 21 for clothing.
The 9/11 site has a small tribute building where you can get tickets to do the ground zero tour! I suggest you do this!!
Go to the Theatre and see Spiderman! Its the best show I have ever seen! The high-wire stuff is truely awesome and funny!
Enjoy man..