There is another update on progress on the RV-10 prototype on Van's web site. See RV-10 update. I think this model will be a real winner for Van's as many previous RV builders have families now, and need a four seater. There is little competition in four seat all-metal homebuilts. The only other ones that jump to mind are the BD-4, (not many built) and the Zenith CH-640 (an ugly poor performer, in my opinion, but I might be biased).