You guys want speed? Take a Locust 6M, speed with out MASC 227kph, with MASC 302kph. With Sprinting rules it would have a maximum speed of 378kph!
It's the fastest cannon mech available.
That's what we need for light mechs...an option with absurd speed and narrow profile, but paper armor, no fancy electronics, and crappy weapons...great option for the guy who wants to distract and draw enemy fire just before the rest of his team moves in.