If they did a dual compound dhr2 in doubledown it’d be good but they don’t 🙁 They do have an Aggressor 2.5 in DD but tbf it’s nothing like as good as the dhr2- it’s usefully faster, but it gives up a load of grip to do it, it’s not a good exchange. I’ve stuck with it because I have the tyre, it’s not terrible but it’s not great.
I love the rockrazor in the old supergravity, easily the best tyre and best carcass schwalbe have ever made, but it’s longdiscontinued. If you can find one of those they’re in a class of one. Don’t confuse it with the more recent supergravity, it’s basically dh weight, schwalbe took a big step back on carcasses when they went all “super”