I can't tell from that link you gave, since it just redirects me to the Benq main page for Canada.
LaCie makes good external products...
http://www.lacie.com/caen/products/range.htm?id=10014Those are for External DVD±R products, up to 16x and Dual Layer.
Also, Apple does not make their own drives and such, they buy them from third parties. The drive in my PowerBook is a Panasonic brand drive.
Edit: Ok, I got your link to work, but couldn't get a price.
http://www.cdw.ca/shop/products/default.aspx?EDC=687858 is an internal drive from LaCie that does the 16x burning and dual layer.
http://www.lacie.com/caen/products/product.htm?pid=10568 for more in depth product specs on that model.