Dell knows what George Washington, Abe Lincoln and others would have wanted. They are brining in Presidents' Day with deals on Dell desktops. You can save 25-percent on the Dimension E520 or E521 and they will even throw in a free Dell 725 Printer. The three available desktop have a variety of specifications, but all include a free upgrade to Windows Vista and an LCD monitor. Prices begin at $649 for the lowest-end model.