just get a cheap set that you think look's nice if you have a windows in your case, if not just get cheap stuff.
not bashing you but now days ram is ram. and you have an AMD system is not high end so just get what's cheap 0.001 of a second on ram timing will not make a difference .
Some have dont testing and 1333 to 1600mhz gave a performance increase, going from 1600 all the way upto 2600mhz made little to no performance increase.
unless your going to be spending £500 on real high performance ram it makes no difference, and even then is minimum