I've been looking the most at a custom WASD Keyboards Hotswap V3. I like that I can order it with practically any legends I want. The switch I want isn't one of the listed options, but being a hot-swappable keyboard eliminates that problem—I'd be free to experiment. (I'd like to try out the Zealio 67g, by the way.)
The Model F F104 keyboard from Model F labs appeals to me, too. If only it weren't a limited-time item that I'd have to put on my credit card to be able to afford

What do you think? And if any of you have played reasonably modern games with a Model F (either an IBM or a Model F labs board), what is your opinion of it as a gaming board?