I tend to look at my full picture, from camera to archive when selecting these things. I shoot 16GB cards typically, because I am able to archive 1 card per one BluRay, including the LR Catalog info, and the Jpegs I typically publish from those images. It all fits on one disk and makes a lovely archive.
For the D800 I am going to move to 32GB cards, and move to 50GB BluRay's. It's more expensive to do that, but it makes the most sense.
I prefer Sandisk Extreme Pro, or Extreme's for my use. They have never caused me any issues, and I like the company. Others like Lexar but I am not a fan.