I needed to replace my old keyboard recently and since I type a lot, I wanted to get something nice so I got a WASD CODE 104-Key Illuminated Mechanical Keyboard with White LED Backlighting with Cherry MX Brown mechanical key switches. With the o-rings I got for it, it’s also quieter than my old one.
This isn’t so much a gaming keyboard, as a typers keyboard. It feels quite nice. The keys are perfectly shaped and spaced and the mechanical action is divine. The individually backlit keys are nice, though I don’t think it is programmable the way you’re describing.
Was it worth $150? I guess if you do a lot of typing, then the even a slight increase in ease can be a good thing.