If you plan to carry it around, do you care much about the weight?
The current Poker II comes with a plastic case and is fairly light, whereas I believe the Poker 3 will have an aluminium case. From the images posted so far by Vortex it looks like the case Pexon has been selling.
I have 2 60% keyboards, one of which I carry with me to work daily (depending which one I feel like using). I have a KBT Pure Limited Edition (aluminium case, IMSTO plate added) and a built up custom (GON NerD60) using the Pexon case. Both of them are quite heavy since both have an aluminium case. I carry them in a backpack, so the weight is not an issue.
If you don't mind about the weight, I would definitely wait for the Poker 3, at least for an official list of specifications. The improvement in typing feel of a good aluminium case is well worth it.
If you're after a really compact mechanical board to carry around more easily, though, I'm working on one...
https://geekhack.org/index.php?topic=66836.0 Will still be quite a long while before they're ready, though.