The rationality would depend on what you need, wouldn't it? If you have a nice, stable place to work, you can optimize for that. Big high-resolution monitors,

The rationality would depend on what you need, wouldn't it? If you have a nice, stable place to work, you can optimize for that. Big high-resolution monitors, nice sound system, great keyboard, several pointing devices to switch between: these go well with desktops. If you move around frequently, or don't have much space, that constrains your choices.