So how did you pick a keyboard? And how do you pick the second keyboard after that?
For physical testing I have 2 Data911s I bought for 25 shipped each. Testing an offline keyboard is way different from having real time live feedback on screen, especially noticible with clear springs as they are heavy to bottom out but surprisingly easy to actuate and cushiony. I do this for testing MX stem/spring combos.
Also I change maybe monthly the F-Rows on my Shine II that I bring to work. So I can spam keys when no one's looking and figure out what I want for my next board.
Testing alps is something we've talked about and something I want to get into. I plan on using this same method. Buy a bunch of switches and swap and solder.