I'd have to say the Logitech Elite Keyboard (corded version) - I nearly bought one myself about a week ago when I went in Best Buy to buy a new hard drive - it was either that or more CD-R discs... so I picked the CD-Rs (100 pack) and held off the keyboard until next month anyway. I'm trying to replace my brand spanking new (about 6 months old) keyboard right here, a Microsoft Multimedia Keyboard... it's great for gaming but the layout of this thing sucks! The Insert key is on the print screen button right next to F12, and the home key is right above a LONG vertical delete button. The layout isn't too good for games that I play.
The Elite is similar in most ways to this Multimedia Keyboard (blue color on top) such as the F-key function being disabled at startup, media buttons are pretty much similar, but the big difference is the area between the alphabetical keys and the number pad keys. Oh yeah, I forgot to mention that the Elite KB is in BLACK!!! ::swoons:: Can't wait to get one next month!!
EDIT: Forgot to add in that the Elite keyboard would go very well with my MX-700 mouse I have here... mmm, talk about color coordination!