I know I may get flamed for this, but here is why it costs more to have this done at the factory.I am surprised. The price is prohibitive. I would have thought it would be a lot less to have Whites do the install.
At those prices, I hope Whites is at least guaranteeing the workmanship of the install.
First, if you are having a made to order suit, having the p-valve installed at the factory would convienent, because it would be ready to dive when it reaches you. You are paying for the convienence of having it done at the factory. Could your LDS install it for you? Sure, but then you are waiting a couple of days to a couple of weeks to have it completed. Many of you are talented and can do that kind of work yourself but not everyone wants to trust themselves to poke a hole through their new drysuit.
White's is installing a Si-Tech valve. Even though Whites buys in bulk, the valve isn't cheap. Part of the cost is the valve itself. Also, the pressure testing that White's does on all its suits is pretty impressive, better than anything that is done in most LDS. The Fusion is designed to fit differently. Getting the p-valve lined up perfectly and making sure that the valve is in the right spot is going to be different and a little more difficult than a regular drysuit. Lastly, White's is going to warrenty the work they do. Why wouldn't they?
You are paying for convienence, workmanship and warranty. Also, keep in mind the exchange rate isn't what it used to be. Things cost more in Canada. So, if you trust yourself, or your LDS to install your p-valve right for you, then save the $$$. Otherwise, Whites can take care of putting in options for you. It is just going to cost more.