The HANS device and it's exotic price tag
are targeted at CART, F1 and so on. Perhaps
sometime Downing will make one targeted
for club racers.
That being said, I do see a lot of drivers
who don't or won't wear simple neck collars
that are about $45 - $65. They are really
pretty comfortable once you get used to them.
They don't provide protection close to the
HANS device, but they can help prevent
many neck injuries and they're cheap.
When I am driving, I can't even tell I
have it on.