Hi meow,
I have limited knowledge, but what my few weeks of rummaging have narrowed in on is either a heavy, high-quality modern board like the Ducky Legend, or going traditional with a G80-3000, in black.
Undecided regarding switches, I've only really tried MX Red and Black but been very happy with both. I think linear is the way to go for me.
Just yesterday I discovered the G80-1800 & G80-11900, and I'm really fascinated by the 11900. Both of the latter appear to be very hard to track down in my layout (ISO Nordic) though, so I will get something else in the meantime.