I bought a Roccat Isku last week simply because I've been needing a new keyboard, and I've heard good things about it. The blue is a nice touch, though I've only used the extra keys for World Of Warcraft, which I shortly realized that the game simply isn't for me.
I really just enjoy having a higher quality keyboard, along with a pretty large wrist rest that comes in handy. Also, I enjoy the well-done media keys.
"Opinions are like magnets, nobody knows how they work." - Foppe