Like previously mentioned Corsair is a great brand most likely can not go wrong with the brand. I have however used G.SKILL alot lately, newegg.com runs great deals on the brand and love the brand never a problem (I don't overclock) , also used patriot twice with no problems and Adata was in my previous Game/Development machine because it was cheap at the time and didn't appear to be bargain basement cheap chips...
Kingston I am not sure you ever know just how good the quality control will be on the chips they buy (Kingston X can be GREAT this shipment then bad the next)...I think Corsair, Crucial, Gskill use just one chip supplier (please correct if I am wrong on this)