There are hardly any experts here. But there is bunch of amateurs which bicker with each other about what is better. Whether it is switches or a keyboard shape. Whether the keyboard should be split or in one piece. Whether it is keyboard slope (forward-backward angle) or keyboard tenting/opening angle (middle part higher than sides) or rotation of a keyboard half (how much should be left and right part rotated to face each other in the horizontal plane). Opinions differ.
See danneb's post:
https://geekhack.org/index.php?topic=98277.0add switches:
People playing games which require quick key presses in sequence without much precision how many times a key was pressed prefer linear switches (e.g. cherry mx red).
People requesting more assurances about how many times a key was pressed (but to not care that much about speed) prefer some form of a tactile switch (e.g. cherry mx brown).
Some prefer light (easy to press) switches to stress finger less. Other prefer heavier switches so that they do not bottom down(*) that easily. Then there are people who compromise: they take lighter switches and cushion the sudden stop with rubber o-ring. But in such a case it probably makes more sense to just go with a rubber dome keyboard instead of mechanical.
(*) There is some stress to fingers related to sudden switch movement stop when it hits the bottom side of the travel range.
add keyboard shape:
If your husband does not have a problem investing about an hour a day for about 2 weeks to adjust to new layout then I would recommend Kinessis Advantage. It is not a gaming keyboard but one can play games with it easily after key binding redefinition in a game. I played games with Kinesis Advantage for years. The only problem is that the default game key bindings are optimized for a standard layout. They must be redefined to better suit the new keyboard shape.
