I agree, if you've ridden and loved the Slayblade I'd say go with it. You won't regret it, it's a solid board. Any durability issues you might've read about are probly things you'd run into with any other board ridden aggressively.
I encourage you go try and demo one of the Lib/Gnu boards before going in for the purchase. If you've never ridden a rocker/camber board with a form of MTX before, you might love it, but you also might hate it.