Wanted to drop in and offer another vote for the K552 - aka "Visnu" from Redragon.
That was my first mech keyboard. When I discovered that it had hot-swap capability, I replaced the switches with some Outemu Silent White switches (eventually spring-swapped them with the springs from the original blue switches that it came with).
I hear that Akko CS switches are compatible with Outemu hot-swap sockets. Haven't tried it myself, but I've used Akko switches for a couple of builds, and I'm pretty happy with the result so far!