Hi Protato. Welcome to Geekhack.
I still use a K70 with MX reds with my gaming rig.
Those NK65s look like great little boards.

I hadn't heard of WT-65XT. I have always loved the F keys being in its own block on the left of the board as well. If you like that, you may also like the
LFK 78k. I hope LFK returns from the void so I can actually order some things from him.
You may want to post your little informal poll in the
Keyboards section, it will get a lot more traffic there.
I can't really say I have an absolute favorite form factor myself. 65% and 75% work for me, but getting anything with my favorite switches in those sizes is near impossible, and I'll go with a weird old clicky switch over an ideal form factor any day.