Pizza by the slice?

Rather than eating an entire pizza from a single spot, I an thinking about getting a slice from various locations. I know most of the places on the Strip:
New York Pizzeria @ NYNY
800 Degrees @ Monte Carlo
550 @ Aria
Secret Third Floor No Name Mystery Meat @ Cosmo
DiFara @ Caesar's Food Court
Francesco's @ TI
Flour & Barley @ the Linq
Fulton Street Food Court @ Harrah's
Pin-Up @ PH
...and, of course, Pizza Rock across the street from Downtown Grand downtown.
Can anybody recommend some others? The only two rules are,
(a) It has to serve pizza by the slice, and
(b) It has to be within range of the Vegas buses, so anything south of Tropicana is pushing it.