which memory is best for my system

[clayer]

which memory is the best
just rebuilt system into new case,cosmos 2,ga z68xp ud34, i5 2500k, sli gtx 580 using memory from previous case 16g hyper kingston genesis,4x4.
im going to build up old case for daughter and use my kingston for her.
i mostly use cosmos for gaming, can anyone suggest the best ram for my useage price is immaterial and looking to overclock soon.

thanks.

 

[clayer]

thanks for advice the kingston memory is 1333mhz.should i change it ?
link for case build,

http://imgur.com/a/nTyAg/all#0

not finished yet changing fans this weekend might go noctua all over!

ty

 

[clayer]

sorry not changed fans round yet on cpu cooler been busy this week doing it at weekend and changing fans at the same time.