I use Ergodox Infinity keyboard and I'd suggest: separate left and right hand boards, columnar or ortholinear layout, thumb clusters, mechanical keys and profil

I use Ergodox Infinity keyboard and I'd suggest: separate left and right hand boards, columnar or ortholinear layout, thumb clusters, mechanical keys and profiled keycaps. Maybe a good question to start with is "how much are you planning to spend"?