I think scissor doors in a VX would look dumpy. They just aren't the right shape to begin with.

I've never seen this as an aftermarket mod, but what I would really like is to have sliding doors, like all the minivans have for their backseat doors. As it is now, the shape of the cladding would probably get in the way, but assuming that isn't an insurmountable problem, I think it would be really cool to have the doors pop out a few inches and slide back over the rear wheels. You would never have to worry about tight parking spaces again (except for the other guy's doors).