Somewhere there is a thread which included a comment that Diamond was trying to buy the process from their former supplier - dying the wood and impregnating it with resin using a vacuum bagging process, so they could take it to another supplier,
Diamond has some black topping on some tables used at a tournament. Comments posted here indicated that it showed chalk and finger prints - not a rave review.
Gabriels uses Dianite rails - prsumably similar to Diamond's offerings
http://www.loontjensbilliards.com/gabriels-sentinel-dianite
The Sentinel was also on my short list, they have 10 foot table as well, but with the weaker aussie dollar and shipping costs from Asia (they told me thats the closest distributor) it was too expensive.