memroy recomendations for sabertooth z77

[rholdcroft99]

Hi all, i currently have a set or G.Skill F3-14900CL8Q-16GBZM, and one stick is bad. I am in the process of an RMA, but what I would like to know would it be beneficial to get a kit of 2 sticks, or 4 sticks. also is the 1.6v something to worry about.
thanks, rholdcroft99

i7 2600k at 4.7ghz
Sabertooth Z77
gskill 16gb 1866mhz
2x xfx 6950 in xfire
samsung 830 128gb ssd (os)
600gb wd velociraptor (storage)
1200w silent pro gold psu
HAF X casea
NH-D14 cooler

I was thinking about http://www.newegg.com/Product/Produc...82E16820231510
or http://www.newegg.com/Product/Produc...82E16820231571

[Tradesman]

Either set will work fine with your mobo/CPU combo, I've run both w/ a 2500K and a 3570K on the Z77 and the P67 platform....the RJ X sticks will be a little less stress than a four stick set on the MC and leave room for expansion