Looks like a perfect option IMO. I looked at the SuperX when I was looking for my 'do everything bike.' It was just a shade too expensive for what I was looking to spend. If I had found one half off, I'd probably be riding one right now.
I've got a Focus Mares; aluminum CX bike. I've raced crits with it, raced 4 hour gravel rides, races cross with it, gone on 100 mile road rides with it. I think you would be ecstatic to have a supersix for everything, up to and possibly including the point you start threatening to podium in cat 1/2 races.