Edit: I talk a lot of crap, you can just skip to the bold text.
The build quality on the Poker is not great... but it's not really meant to be. By 'not great' i mean, I can see where the plastic was molded... the sticker on the back is just covered with thin laminate (and inkjet printed?)... it's pretty basic and no-frills. There is no plate, its PCB mounted cherry switches screwed into a plastic case... but this does the job as far as I can see - it's certainly nothing to be worried about.
Comparing it to a HHKBpro is like comparing a kit car with a porsche. Don't get me wrong - I like the Poker and I use it every day. I'm just not going to lie and say it's built amazingly well. It's functional. Both cars will get you from A to B... but one will cost you significantly more and have no back seats.
The layout for the Pure is in
this thread and that is the main difference (other than LED's).
If I'm honest, I think I prefer the layout I use on the Poker (especially WASD cursors) - I'm tempted to get a pure when it's out though. I'm assuming the build quality will be the same (and I have no problem with that). My poker came with a 'servicable' set of PBT caps. I actually prefer the slightly slippery feel of ABS... so I'm replacing them

(purdy colours ahoy).
The only (very minor) thing that bugs me about the Poker is its 'Esc/~' key; and having to swap into Fn+Q mode (Esc Lock). If that layout is to be believed, it looks like Esc, is just Esc... which fixes that problem. No massive dealbreakers though - I'm looking forward to getting the metal cases and putting a sponge layer under the PCB for a bit of stability, that - along with a heavier aluminium case, should get rid of the plastic-cheapo feel.
The other issue with the Poker (which I haven't seen mentioned much) is that Caps/Tab keys don't have stabilizers so can have a lot of side to side wobble... Mind you, my Leopold which both weighs and costs a lot more (and is less portable) suffers from the same problem. Also, when removing keys, you have to be careful you don't yank too hard... I nearly ripped the stabilizers out of my enter key. I think that's the ONLY issue I have with PCB mounted keys, its easy to snag them if pulling them out with the tool... that's a pretty minor point. It doesn't effect any functionality.
I own and use the RealForce Topre105uk at home (which is nice but huge) and at work I use the Poker (with MX-blues) every day, I've now gotten so used to the poker layout that I automatically keep hitting alt+W/A/S/D instead of using cursor keys... There's no point comparing Pure/Race/Poker to the HHKB or RealForce... (build wise) These are simple PCB mounted MX-keys shoved into a very basic plastic case, they are not meant to be an example of brilliant engineering.
I think it speaks volumes, that for most people, even this cheapo little keyboard outclasses the vast amount of **** OEM keyboards you can buy in stores. I had to type on rubber domes this morning ... ugh. UGH! :doh: if anything, the only bad point, is that the price point is a little high for what you get. So, it probably IS worth it, but as other have said,
you might as well get a Poker 