Now, a few months later and a lot of hours with VR on my head, I don't feel any motion sickness anymore. Drive Club is awsome despite the lower GFX. The feeling you actually are in the care is so freaking cool. You drive a lot better when you have the feeling you're in the car.
My advise, try before you buy but don't let motion sickness be the leading part. Your brain will adapt. Or at least the motion sickness will get a lot less.