i think that they will use an upgraded Source engine, or probably
a new engine all together. But they will only strat planning in about
four years.
but the current engine looks promising!!
with personal experience, i think PC-Cillin is a very good program, it picked up viruses/trojans/worms that Norton didn't. i think that's kinda strange.
but get a Firewall and your virus up and running well before you connect to the internet or
a buddy's computer!!
that kinda person is hard to find...i would love to help you, but i'm currently busy with another project and won't have time to help you...sorry bro!!