Cherry Keys
Interesting to see that many of these keyboards are using Cherry mechanical keys.
They look a bit pricey though, however there is a benefit to using quality components and I can testify to the longevity of the Cherry keys; my 16 year old son is a keen FPS player and his weapon of choice is an ancient Cherry keyboard that is older than he is (my wife stopped using it about five years ago because it is beige and it took up too much desk space, she's had two keyboards since then).