The main keyboard I use at home is a HHKB Pro 2. It came with fixed weight domes, but I recently swapped them for varied weight domes like my keyboard at work has. I used 70g domes on the modifiers, 35g domes for the keys your pinkies press, then 42g domes, then 45g domes for index finger keys.
I use an IBM SpaceSaver II keyboard with my servers. It's a membrane keyboard, but it doesn't feel terrible, and it has a good trackpoint for anything that needs a mouse. I got it for $10 from my university's surplus shop. It was connected to an old PS/2 KVM switch that controls all of the servers in the rack. I joined the kickstarter for the PiKVM v3 hat, and I connected it to a USB KVM switch to control my rack.
Here is the keyboard I use at work. It's a Topre RealForce 87UB with varied weight keys. I got it used, and I replaced the keycaps since they were worn down, and the stock caps have black text on black keys, which is difficult to read. I drilled holes through the numlock and caps keycap of the set I installed to let the indicator lights through.
