Depends on what kind of zombies we're talking about here.
If new age dawn of the dead zombies? Stryker's infinite ammo guns would have good mileage.
If old school slowpokes... or even better, High School of the Dead style blind, superstrong, slowpokes, Id rock human sektor's gear.
I could have a blast w flamethrowers, rockets, and a teleporter that I don't necessarily have to shoryuken a fool when I use it.
(get surrounded, tele through the floor, appear accross the street, bernie away)
And to be quite honest, Id love to see what a real life sektor B1 would do to a zombie body. I think it would explode like a pinata.