I got my hhkb pro 2 over the weekend, and I, too am in love. I do medical transcription as my day job, and then go home to my linux system at night. I wanted something that was easily portable, so I can take it back and forth to work. I must say, I was initially a little concerned about the arrow keys until I realized it was a total non-issue, in fact the setup on the hhkb just makes sense: the function key is in the perfect spot, so adapting to it was easy because it just felt right. I love its sound, I love the texture of the keys, I love that the caps lock key is gone, I just f-ing love it.
I got into mech keyboards a few years ago when I picked up a Das with browns. A few months ago I felt like I wanted to move onto something different, so I picked up a CM Storm Trigger on Amazon with blues. It took me 5 minutes to realize it was not for me... and maybe a gamer would like it; but for me it just didn't feel right, keys didn't have a uniform sound (and it was ridiculously heavy). When I got my HHKB, however, it was love and respect. It really is.... perfection.... although it could use 1 or 2 click clacks. ;-)
~sam