I own an embarrassingly large number of Topre keyboards, typing right now on one I just got this week. This is beyond insanity.
https://www.theverge.com/keyboards/633344/norbauer-seneca-3600-keyboard-peek
The $3,600 keyboard that’s optimized for joy.

The Verge
@paul Tell me a good Topre keyboard to buy so I don't buy this $3600 one. Please help.

@gruber RC1 I really like, but you have to be able to deal with the slightly odd shift row layout. R3 is good for a more standard TKL or 100% layout.
https://mechanicalkeyboards.com/collections/realforce

Some folks really dig the HHKB ones but I refuse to use a keyboard without arrow keys. Though they do look really nice.
https://hhkeyboard.us/hhkb/pro-hybrid-type-s

Leopold FC660c is a personal favorite but is no longer made.

Start with a 45g + silent switch (which should be the most common these days) and then you can branch out.

Realforce

@paul @gruber
I try to convince everyone I can about this because I think it’s so great. Use vim style arrows keys, but not the standard hjkl keys, ijkl. It’s a regular inverted T shape, using caps lock as modifier for it. I think it’s a game changer not having to move hand at all to use. Bonus point is not having to worry about half height keys. Really easy to set up using Karabiner Elements on Mac for any keyboard.