Brown.
It's eventually going to happen. I agree, just get both.
Just a FYI, I just picked up the brown grain at a crazy good price here:
http://www.debenhams.com/webapp/wcs/stores/servlet/prod_10701_10001_084010362073_-1
Approx. 50 pounds less than other places and also free international shipping, and a free 5 pound gift card to boot. While there will be import tax most likely, it is still a great deal. Get them while they last!