I use Crucial because I like their web configuration tool, and it's very high quality. Corsair is similarly high quality, tends to be more expensive. G.Skill gets high ratings for speed, but I don't know about the quality. Mushkin is also a high speed/quality? brand. Kingston is a solid performer, but the quality's not as high as Crucial or Corsair in my opinion. And to round it out, I'm running OCZ in my home computer that has probably about 8 hours of use on it over the last 2 years.

I am the Doctor, and THIS... is my SPOON!