With its 150-sheet input tray and no way to increase capacity, the Samsung SCX-4521F ($250 street) is clearly aimed at a small or home office that doesn't need to print a lot of pages. But it's also designed with the understanding that just because you don't need a heavy-duty printer doesn't mean you don't need all the functions you'd find in a bigger, more expensive AIO. The result is an inexpensive AIO that can print, scan, fax, and work as a standalone copier, and includes a 30-page automatic document feeder (ADF) to make quick work of scanning, faxing, or copying multipage documents.