The retail box says 1640. The sticker on the drive the back of the drive says:
Manufactured: May 2005.
So it the BenQ1640. Stop by MicroCenter again dude. You will pleasantly surprised. I too thought it was 59.99. Went to the cash register and the price rung up 39.99.
EDIT: Ok just plugged it into my comp. Comes up as BenQ 1640. There you have it fellas. $40 bucks gets u a BenQ1640 Retail version!!!!