I was thinking about this some more
I think Storcks are like Saabs were in the 1990s (pre GM). Well made, a bit odd, quirky, different. Not necessarily better, just different. Walk into the LBS with your Storck, stop by the side of the road, riders will ask you about it. You are part of a little club. Also you get the halo effect from the Fascenario (best bike in the world?), and the cult of personality of Markus Storck. You don't get that with a Trek, SuperSix, whatever.
But quirkiness costs. As with the Saab, which had a bloody awful gearbox. Eg with the Storck you'll get rear entry dropouts, because Markus says so. Not a big deal, but a tiny
bit more awkward than normal dropouts. And the quirky sizing. Also if you have a warranty issue, you can't just walk into Halfords. Small stuff like that.
If you like the idea of being different, get a Storck. They are lovely, brilliant, beautifully made frames. But be aware that difference has costs as well as benefits. If you really don't care about image, quirkiness, etc, get a Planet X Pro
and save yourself nearly a grand. Or a Ribble, or a [name of £1000 frame]. It will ride just as well.
My 2p worth anyway!