You know that scanner of yours has an optional add-on according to this pdf: http://solar.sharpusa.com/files/cop_dow_MXM350_450_bro.pdf
It might be less useful than the Brother since the add-on might cost more than a Brother MFC, certainly seems to be a great scanner though.

Yep, according to the $375 price here it probably isn't worth it.
http://www.jtfbus.com/JTF/item.cfm?catID=14&ID=6207