If i had that kind of money i wouldnt spend it on the death star to be honest, sure it looks good but to me its just to exspensive and with all the other sets coming out i would rather buy them instead.
Hmmmm if its done with plates then i think that in places it would be fragile, bricks seem like the best way forward but i suspect that plates is what we will get.
Then again perhaps we will get a mixture of the two.