Using mechanical keyboards on my desktop has ruined everything else for me. I type 20 WPM slower on my laptop and I hate doing it. I will not be carrying around an external screen. It's a T420 with a 14" 1400x900 screen, which is okay with me for for a little while at a time. I sometimes borrow a monitor or feed into a small TV, but not that often. Basically I am a university student and when I visit home or friends for extended periods of time I take my laptop and a mouse with me, and occasionally my RK-9000. The probelm with that is I have to carry it outside a bag because I have nothing that it can fit lengthwise inside. A tenkeyless board would be easy for me to take on trips.
I think that 10-20 million presses will be enough for me. I have a feeling that I will be passing this board or perhaps a similar one on as a Christmas gift to my dad, since he is something of a programmer and types a lot. He has his own office, so noise wouldn't be an issue for him unless he himself didn't like it. I would just let him try out the one I would order for myself before surprising him with one if he liked it.