I've already tried an HHKB, a topre Realforce 55g and a Leopold 660 (I have all 3). Of these, in my opinion top one by far is Realforce, followed by Leopold. So I bought a Realforce RGB. It's my new top one, now. Delicious sound, soft, UAU.
I hope something comes of this especially with the HHKB.
akuski
Don't forget about Type-S Squeak. Be advised that it will go away over time, sourced from the /r/mk wiki. I talked to a PFU customer service rep who told me that.