If you are going to get that card, make sure you buy a big enough case to fit it, that card is about a foot long and needs a big *** case, also, I do not know if they have the blocks yet for those cards, so you might need to wait a little bit for those when you order it.

Even though it's cheaper, look into getting one of the lower CPU's (eg the i920) and overclocking it, the thing can go to 4.2ghz with good water cooling. If the company is worth their salt, they'll do it for you.