FT-- Forget the outside the roof type!!! They do not allow enough open-air space when the glass is retracted, as the frontal edge portion of the glass blocks out the open space as it is tilted outward. What you end up with is a small sideways sliver of a sunroof opening and a unnatural looking VX.

I'm 6'1" and I can attest to you that there is no shortage of headroom in my electric moon-roof equipped VX open or closed. The Webasto electric moon-roof is the answer to your prayers!!! Go visit a Webasto dealer near you home and talk to the manager for more specific details.