Okay, I'm getting curious about the Ducky series of keyboards. Can anyone explain what the differences are between the models? Also, is there a series that uses PS/2 connection? I'm thinking of trying one, but I wouldn't know where to begin. WASD is a lot easier to build and buy from their website, but I'm looking to expand out for a little bit of wow factor. However, I'm really loving the PS/2 connection of my WASDs. Not to mention I'm loving it so far.