I have a Denton that I bought from Jeff@QuadShop. It's for a 400EX/250R. It's the non-rebuildable. I had one just like it last season on a 250R and never had any problems out of either.
The OEM on a Blaze or Moto was the Ohlins/Scotts dampner, supposed to be one of if not the best there is. I don't know how people feel about them and don't have any experience with mine yet but I know they are super-adjustable and rebuildable. Kinda pricey though ... cheapest I've ever seen one sell for was something like $225 or $250 ... and that was Ebay! :hammer: