I always recommend Crucial. It is extemely reliable and comes with lifetime warranty.
Geil is good memory until you expect some great overclock performance,in that field Geil cannot be a quite good solution...
For overall computer system you'll be satisfy with Geil stability,IMO isn't
it your aim?
Kingston Hyper X, Crucial, or Corsair will outperform GEIL if you're looking for top of the line RAM. Though, these sticks are quite nice, and should do mighty fine if you're not gaming on 1600x1200 with maximum details or 3D modeling or something.
These will do for the average gamer.