Best NY style pie in town is at Casa di Amour on East Trop - very old world Vegas place with live music on weekends and friendly staff, regular clientele. Don't let the dive-setting fool you --the red sauce style food is also very good...some of the best in town.
Settebello is the best pizza in the Las Vegas/Henderson area! Real Neopalitan, wood-fired pizza. Can choose from a list of pizzas or build your own. I highly recommend having the "Settebello" and an arugula salad with fresh mozzerella.
On the Food Network last night, Guy did this profile of a place called Four Kegs that he used to go to in College. It had awesome looking Stromboli, Pizza, Wings, Sandwiches, etc. I would check them out.