I'm glad I've waited. Was going to order NP900X4D-A05US last week.
For extra $50 more I get 8GB NP900X4C-A06US.
Planning to yank out the 128 SSD and 8GB to sell.
Then I'm upgrading this baby to 256SSD/16GB.
Killer Ultrabook for less than $1132.
Thanks again Dragon, your link to upgradeable SSD/RAM push me to buy this thing.