So, I recently came into posession of an IBM Model M (1391401) and wow. This beats the hell out of my Logitech G15. A long with the keyboard, I thought I'd buy myself a new mouse while I was at it. Well, I ended up buying a Kensington Orbit with scroll ring.
The keyboard is amazing to type on. Though some may find it a bit loud, it's a pay off for the sheer coolness of it. I'm still getting used to my trackball and, as you can see, it has an extra wrist-rest attached to it.