We bought a Brother DCP L3550CDW about a year ago and we're very happy with it. It's laserjet, which means it probably isn't photo-quality but we're happy with the colours we get; it also means the heads aren't constantly getting blocked so that you have to waste half of your ink cleaning them.
Printing can be set to single or double sided and the scanner will do single sheets or a stack. USB and/or wireless and easy to set up. As with all laserjets the cartridges last a long time, even the ones it's delivered with.
This is the one, although I bought mine from PC World.