If this is your first IPA maybe drop the simcoe and use columbus with either centenial or cascade (maybe even both) -
3 C's: Columbus, Cascade, and Centennial - A classic combo...
Personally - I would do: Columbus with Cascade...
Others here will probably give you better advice on the hop than I can though as I tend to prefer beers that aren't hoppy. I have done a few good hoppy ones with Chinook and had some nice grapefruit notes.
Edit: I just realized you want a SMASH Recipe...
I have read that Vienna Malt with Northern Brewer hops is a great SMASH beer....