The KBT Pure Pro is fine. As I understand it will not work for the OP because he wants to change the keycaps and the layout is not standard.
However, from a productivity point of view, this keyboard has some advantages.
Here is one of the two I own:

+ It's a 60%
+ Plate mounted
+ Cherry MX, so you can silence it with O-rings or landing pads
+ Available in ISO (UK, DE, FR, ES) and ANSI (US)
+ Direct access to arrow keys (I love the look of the HHKB, but I couldn't work on it)
+ Backlit. I need it because sometimes I have to work with almost no light
+ Programmable: you can change any [Key] or [Fn]-[Key] and assign to it a single keystroke of a full macro. Definitely useful
+ It's available NOW, not next yearThe fact that it is programmable has allowed me to remap Home and End to the right Shift and Ctrl keys. I find that it is very convenient. I have another 5 or 6 useful remaps/macros.
The Minila is close (almost the same layout). The differences are:
+ Offers a free USB port
+ It's Filco
- Available in ANSI US and ISO UK only
- No backlight
- Not programmable
I have considered the Minila for a while and finally settled for a KBT Pure Pro.
If the Leopold 660C/M was available in ISO, I would have one.