Might as well add in the UHK
https://ultimatehackingkeyboard.com/I'm not sure on which to try out myself.
The ErgoDox thumb clusters would likely be not so useful to me, biggest downfall I can see is that they aren't adjustable and therefore fit only a certain size hand perfectly.
Keyboard.io seems similar but possibly better in that there are less thumb buttons (along with a palm key to supplement), but no aftermarket key cap support.
UHK seems like a good split board with some extra options.
The thumb is really the worst "finger" with poor side to side range of motion when you consider ergonomics. In some ways, it almost seems like some boards are giving up some amount of ergonomics for productivity (more buttons available).
Another consideration is a standard 60% board. My pok3r has been doing well and doesn't require much finger movement, and anything you do use often can be moved to a closer key if needed. Right now I'm trying out a HHKB style layout on it with the Ctrl moved to caps lock position, and the backspace and \ keys switched. Overall it seems nice and more comfortable, but trying to give it time to see.
The real question I'm trying to decide...what features exactly makes a keyboard "more" ergonomic than another? I think there are a couple areas, and it all really comes down to adjust-ability to me, but I could be wrong:
- Split (hands can be in almost any position relative to body)
- Re-programmable (if something is too hard to reach it can be moved)
- Extra keys (or layers) available for the reprogramming
Since moving fingers any distance (further is worse) from home-row requires more effort, it makes a good case for the 60% style board and layer keys. I just wish I had a program, and key cap customization available that would help me keep track of what has been programmed into my other layers.
The UHK in some ways seems like a split pok3r, but I'm not certain how it will turn out. I guess sometimes there's no substitute for just trying a bunch of options. Too bad you can't just walk into a computer store and try out one of each!