What type of keyboard might work well for an older person with arthritis in the hands, RSI like tennis elbow, etc. This would be for home use, slab type, less than 88 keys. There are no keyboard stores anywhere close to try things out. I've got an old M-Audio Radium 49 that has a terrible keyboard. I tried a NI Komplete Kontrol S61 and did not like the "diving board" keys on that.