I just bought a 06 VLX two months ago and would agree on the wait, except for the fact that the season will be over by the time you get it. So that is something to think about as well. Is it better to get it now and use it now or wait until next season? Also you must remember you need to put 10hrs on your boat before you start weighting it and riding behind it. Personally I chose the teak swim deck due to the fact if you leave your boat in a slip over night you are asking for someone to screw up your deck. Fiberglass is much harder and more expensive to fix than replacing just a board or two on the teak deck. I do think the fiberglass one is much cooler looking though. If it were me I would buy the one available just because I can't wait, not to mention I did do that anyway. VLX is a bad ass boat and when weighted down it makes a amazing wake. I am running all the stock ballast plus 1200lbs in the rear and 350lbs towards the front.
In regards to some of the other posts, if you buy a boat and your concerned with resale value then don't buy a boat. You are going to lose a grip of money no matter what, so I wouldn't make that your first concern. Number one concern is do you like the boat the dealer has, if not then wait. You are going to have this boat for a long time so you better like it. 500 dollars is worth being happy with your decision. Good luck and good boating.