For myself:
1. G36K with illuminated reticle sight, SureFire tactical light (blind zombies can't see me!), clipped 30-round mags on the tac vest/LBE and as many Beta mags as I can spare. Rounds would alternate FMJ - Frangible - Tracer.
2. AG36 grenade launcher with 40mm flechette rounds for close-in work.
3. Beretta M93R on the thigh, 9mm hollowpoints. 20-round magazines are a nice size, and the folding foregrip adds stability when facing down an undead horde.
4 & 5. a pair of back-up guns, probably P229s with .357 Sig HPs, in back holsters.
6. Short, heavy chopping/cutting sword: kukri/machete/wakizashi.
7. Cyanide pills for zombie bites
My team would be similarly equipped, with whatever could throw the most amount of lead downrange in a big hurry. Since we all know that zombies never let you get long-range shots on them, large-caliber precision rifles are
out. Chief among the equipment would be:
-Magazine-fed, semi-auto shotguns for close-in defense against large numbers of lumbering corpses. SPAS-15s and Saigas, with buckshot loads.
-High-capacity, high-RoF battle rifles for medium-range engagements such as "city street" or "graveyard." Must be able to double as room-clearing bullet sprayers indoors. 5.56mm would be ideal, since zombies rarely use cover or wear heavy armor (the zombie city SWAT team would be challenging!). Most likely G36s or M4 carbines.
-High-capacity SMGs for backup weapons or for more "delicate" members of the team (such as "girl caught in shredded dress when zombies crashed the prom"). P90s or MP5s shooting those super-hot 9mm loads the French love.
-Large-caliber handguns with high mag capacity. Preferably .45s - USPs, Mk.23s, Glock 21s.
-Various hand grenades: blast/frag, white phosphorous, and concussion/flashbangs (zombies have a hard time standing back up once they're knocked over).
Clearly, I put too much thought into this.