I got the Das Keyboard Professional about 2 yrs ago with their educational discout (if you email them they'll bring price down to like $99 if you are a college student)
It's been working fine since and I love it for Starcraft
There is one kind of problem I can think of with it though, which I've heard other people talk about. It really only happens if you are switching it from computer to computer a lot
The Das has two USB connectors to power the keyboard + hub. Some computers work with it if you plug in just the primary connector, some computers require you to plug in both, and sometimes these computers will fail to recognize the Das after a reboot (requiring you to unplug and replug the USB)
For me this is not a probem, my only problem is I wish I got the Das Ultimate
The Professional is not too loud for office work IMO unless you work in a very tightly packed environment. I find it more obnoxiously loud at home then when I've used it at work.