Factors to keep in mind: 1. are you comfortable with remapping keys? I use AHK in Windows and Karabiner in mac. 2. mac/pc? I use the context menu key next to

Factors to keep in mind: 1. are you comfortable with remapping keys? I use AHK in Windows and Karabiner in mac. 2. mac/pc? I use the context menu key next to AltGr in Winodws for correcting spelling mistakes without reaching for mouse. 3. are you a touch typist? In that case avoid back lit. This really adds for unnecessary expense. 4. Is numpad important? Das Keyboard without numpad are on sell. I prefer this to enter lot of data in Excel and also it can be used for remapping using AHK for various task. 5. switches? Would you like to annoy your coworkers with blue switch? 6. do you want to carry your keyboard wherever you go? Das also sell keyboard as heavy as 3 kg. 7. are multimedia keys important? 8. Wire/Wireless? 9. Das ultimate keyboard also act as USB 3.0 hub along with normal keyboard. If your laptop does not have enough UBS ports for your need then you may want to go with it. 10. Would you Touch pad in your keyboard instead of numpad? I have seen such Logitech keyboard.