I'm a commercial airline pilot and as such have a fair amount of experience with crappy visibility, though not as bad as what you've encountered.
One type of airplane I've flown (737-800) has a heads-up display that is awesome in terms of the guidance and information display. It allows one to hand fly an approach very precisely. In the simulator I've handflown an approach to touchdown (on the runway centerline) in zero visibility. That's a tremendous confidence builder as far as how good the system is, though you would never do that in the real airplane.
What's interesting is with an aircraft and runway that are category 3 certified, you can take off or land in really crappy visibility. The most difficult part is getting from the gate to the runway or vice versa.
I don't envy you the white-out conditions you operate in!