I agree totally. I'll keep the RS for at least 5 years. I figure it'll be worth as much as almost any other car of that age in this price bracket.
While brand support is important, resale to me in this instance, is not. Anyway, in this regard, I think given small sales numbers and Skoda's performance in Europe for reliability and customer satisfaction, I think smaller numbers works to the advanatage of long term resale value.
I'd be surprised if they become a huge brand in Australia given the rife brand snobbery, but I'd be disappointed if they didn't become a known brand.