Mmm.. guys, as a confessed min/maxer, I have to inform you that, there's no need to waste essence on senses. Nor powerpoints. (Unless you are stealth type)
You get a normal helmet, from a Rapid Transit Suit, it +0/+2 and is shaped like a normal integral helmet.
Then you ask your GM if it wouldn't make sense, to have Trodes wired into the helmet, and the Visor (or just wear goggles) prepped with Low Light, Ultravision, Thermo, camera and whatnot.
It'll cost a bundle, but its doable from creation and ingame.
Using the trodes allow you to drive a car with a -1 TN, you can hook up smartlink 1, for a -1 TN when shooting, and with optical vision mag. 3, you ignore range penalties.
Added benefits are the covered face and thus better protection of your identity.
Naturally, any bright GM turns around and hands helmets of similar caliber to his goons.
When we run, both sides are pretty much like armored military units. Cover and stealth are important, because you can only take a few rounds of full auto. (Yes, my character routinely does that..

- And lives.)
Your NPC's, if professional guards, should minimum be wearing Light Sec armor and FFBA underneath. - And these Must be allowed, else normal camofatigues + FFBA will be better than Light Sec Armor.
And definately add some fire protection and non-conductive treatment. I usually kit out the FFBA to be non-conductive 5, and my suit to be fireresistant and chemsealed equally.
I fully agree on the SPAS-22, hand it to a few corp guards and see terror in the face of the players. Usually have gel rounds + pepper in a few clips on the surface where civilians might be, once they get deeper, have the guards start with APDS. Sooner if alarm is raised as violent intruders.