I was going to add this to my last post but you replied to quickly.
One additional consideration to keep in mind. All of the tests between the "Magica" and a non-modified Gitzo were done with the discontinued GT3541LS model. The current model (2012) is the GT3542LS which has been updated with a redesigned hub.
The "Magica" will still be more compact and lighter at the hub, but is the ever so slightly better stability (tap test) still valid? The newer GT3542LS redesigned hub traded a little more weight for increased payload, which should increase stability. As far as I know nobody has tested the "Magica" against a GT3542LS using the tap test. I am eagerly anticipating that comparison.