I have a keyboard with cherry blacks, which are the same mechanism as the reds on this keyboard but a bit stiffer. There is not a "click" like people usually think of and experience with cherry blues and browns making this keyboard (arguably) better suited for gaming and (not arguably) quieter. They're sensitive enough that some people don't like the reds, but you can't beat them for speed and ease of use. That MIR makes it a good deal, but why no link?
K60:
http://www.newegg.com/Product/Produc...82E16823816001
K90:
http://www.newegg.com/Product/Produc...82E16823816002
K90 also has the MIR. It has a bunch of extra programmable keys meant for MMO players, but also includes a backlight which the K60 doesn't have.