Any DDR3 memory will do. Also, 1600mhz is the 'sweet-spot' for RAM nowadays.
Anyway - I'd be gunning for a stick of Corsairs or G.Skills; I've never had any problems with their memory.
Some decent sticks imho include the G.Skill RipjawsX series and the Corsair Vengeance series.
this pc is for office and home purpose so it's not worth putting a vengeance or ripjaws memory into it.