Always gone Corsair. I never had a single rma in 5 pc builds (ofc rma incidents are unique for every person I admit.) Besides even if I did i can always count on their excellent customer support.
I'm using OCZ's Black line... and I have used their platinum line before... both were great. Besides that, I've never gone wrong with Corsair XMS, or Crucial.
Never had G-Skill, but I think they are certainly worth a shot if your on a budget.
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