Memory is a matter of practicality. If you don't want to spend a little extra yet still get good performance, G Skill are good. Myself, I only buy lifetime warranty memory as a rule of thumb. Personally, I buy Mushkin,swear by them and wouldn't but anything else because of performance, ocing ability, and great rma support. Now I've never had to replace any of my ram, but a build we did for a friend came with dead mem. Brought back to retailer where tech tested and said it was the 1st dead Mushkins he'd ever seen. He does lots of builds, troubleshooting,...
I've had dead kits of OCZ, Patriot, Corsair as well. Not common but obviously not unheard of. Anyway, ask a real enthusiast about Mushkin or any other brand and go from there.
