So you are looking for a high-end keyboard that goes easier on your hands and can make you more productive? The Kinesis Advantage2 ergonomic keyboard is worth a look. It comes with concave key wells & thumb keys, 20-degree tenting, and fixed split and vertical keys to keep your hands in a natural position.
The keyboard provides ample support for your palm. It has Cherry mechanical switches and can be fully programmed to meet your needs. The bad news? Something like this doesn’t come cheap.