Depends how you determine what best is. The best one I know of is a one owner HJ Sandman van. Un-restored but good condition. To me un-restored is the most important part. It proves how how they were from the factory. Not how they were after a game of forum Chinese whispers.
I feel that looking into the future that these cars are going to be the best ones to have.
I also feel that the biggest downfall of this competition will be this..... If it came down to a ute and van,the van would win due to peer pressure.
Do we really need a "best" Sandman? No just enjoy the one you own.