Cool. I'm not familiar with Ureshii except that I know they subbed Gonzo's first theatrical feature which I haven't seen just yet. I'll check out their release because I'd like to see how they are since I was shocked no one else subbed that movie and they will probably continue to pick up oddly overlooked projects, and it's not like I've not downloaded two versions of a series before.
Oh, given how much potential this has to be a hit I was hoping Shinsen might pick it up if they could manage another series. Since I'm not too familiar with how reliable Ureshii is at sticking to their projects and I like many of Shinsen's releases (they are handling even extremely tough translations like the cool show Bakamatsu really well), I'm glad Shinsen will also be doing it since there will no doubt be tons of scifi technobabble and series specific terms (even just judging from the early entries in the website which will no doubt be added to as we go).
Two groups thinking of picking up Soukou no Strain just made my day.