Having gone through lots of those keyboards is what lead me to the HHKB in the first place. That layout is so hard to find on a high quality keyboard, which is part of the reason that I use a converted Model [MF]. I have one of those hooked up to my system though, in case one of the IT folks needs to use my machine, since the remapping on my IBM is software based, rather than hardware.
Those keys on the left hand side are kind of a pain to get working in windows, just as a warning, as is the unlabeled key in the "normal" ESC location.