PS: in the absence of a true "navkeyless" model, I bought a Filco tenkeyless through Amazon. I'm anxious to see how it performs.
Well, it's here. My first modern mechanical board in 20 years ;-) It looks as decent as I expected, but I have to say I'm somewhat disappointed: first, the board is wiggling on my desk (!), in a very noticeable way (tested on several desks). Second, I'm not very happy with the blue switches: the sound they produce is indeed very high pitched, which is irritating to my ear, not to mention what it would do to my officemates... I also feel that the release point is higher than where it should be: for example, I get those glitches with double caps at the beginning of words, because the shift is not released when I think it is.
I've compared my typing speed with this one and a $20 Logitech Classic 200. With the Filco, I can score between 87-93 wpm, after some practice; with the Logitech I get 91-94 more consistently, and the noise during that 1 minute test doesn't drive me crazy... ;-) oh, and so far I am not missing the numpad ;-)
I think the Filco goes back, if only for the wiggling defect; I'll probably replace it for a Cherry MX Brown version. I just hope that the even lighter actuation/peak force of the browns won't feel too light (unfortunately, there's no tenkeyless with MX Clear switches). I still wish I could get my hands on a model F, just to try it out. I know this is off topic, but I'd love to hear others' advice.