I'm 6'3" and will be getting a pair of V-Pro's this year too - I'm going for the 180cm length.
My current skiis are Salomon X-Scream 9.0's 185cm. With the extra width, you can easily get away with a shorter length.
I could probably get away with the 190's, as I've got a reasonably large foot (Boot size 30.5) to give me leverage for turning the ski on the ground and in the air, however I'm only 80kgs, so don't need the extra surface area to keep me afloat when I find some pow. If you've got a heavier frame, are used to longer skiis and ski a lot of pow, the 190's might be a better bet - other than that, go for the 180's [img]smile.gif[/img]
Hopefully somewhere in that babble might be some useful info for you