Cooler master mechanical are nice, older models needed some force to actually plug them in and more than a few people returned them thinking they were doa. Believe they have been changed or part of the manual says to keep pushing until you hear a click or both. Anyway found it pretty funny. I am pretty happy with my cooler master keyboard if you really are interested about getting it. I've had a few friends that have gotten the corsair keyboards and none of them have had led failure issues.
Ordered a Corsair K70 and 30 minutes they shipped it. I had changed my mind once I started to read that people have returned the damned thing 2-5 times also getting LED failures.
I think I'm going to go with a Cooler Master keyboard (http://www.newegg.com/Product/Product.aspx?Item=N82E16823129024) , unless anyone here can suggest me good keyboards for $129 and under.