Hi. Im deciding which ram to buy for my 4790k...

Could anyone with experience help me with the choice please ?

Kingston HyperX Predator 8GB (2x4GB) 2666MHz
or
G.Skill TridentX Fan 8GB (2x4GB) 2666MHz

or G.Skill TridentX (2x4GB) 2800MHz Kit (Do u think these will go higher in term of OC than the two listed above ?)

Thank you