If your boyfriend is into steak, and you aren't strapped financially, you could take him to Morton's (
http://www.mortons.com/). It's an amazing steakhouse that is one of my personal favourites.
On top of that, if he's into cars, you could surprise him with an Exotic Car Package where you pay to drive a Lambo/Ferrari/etc. around for a day and it could include some track time so you can really unwind the car (Driving @ 240km/h is pretty fun!).