Seeing as money doesn't seem like much of an object to you (hey, we all have expensive hobbies, this or a car right? lol) there is no need to wait. You won't be happy with a stop gap, and if you are spending this much money now, what is another upgrade in some months when dx11 is actually useful? Thre is no telling how long it will take for dx11 games to come out, and as for hardware no matter when you buy it will be replaced by something faster in about the same amount of time..
Go nuts. Get what you want when you can afford it, upgrade when you feel like it. No sense playing the waiting game as there will always be something shiny coming "in just a few months."
As for whether it is worth the money, well that is not for me to say, I'm sure you'll enjoy a watercooled super computer, just don't spend more than you can afford!