I was almost down the rabbit hole. I stopped at Topre Boards. I enjoy typing and prefer it to any other board. Typing is my daily business amd to me worth the investment. I put corporate issued keyboards aside.
Personally I went to save a buck with similar but different NiZ brand electrocapactive rubber domes. I can never go back. I'd love to get something more ergonomic but electrocapactive isn't an option for most split boards and I'm too old to want to bother building another keyboard like my ErgoDox which now collects dust.