Good transistors for making stepper motor driver

BetterSense:
Well, I guess I have to figure out how to drive the damn thing first. There are only 5 wires...red, green, blue, black, and orange. I'm not sure if I need H-bridges or half-bridges or what.

You need a half-bridge on each. See the Jones link someone else provided for more on how to drive it -- five phase motors are kind of weird.