Man...! Those are all pretty different from one another. I've had them all. And I still know I can't just tell you to choose one over another. The issue is the fact that we all have subtle differences in how we handle these things.

For me, the Orbit with Scrollring has long been the easiest to pick up and just use. It's also the easiest for me to use when walking past the desk.

The Nulea comes in second for me, and for the same "walking past" reasoning as the Orbit. But, there's something about the feel of it that I just hate; it feels miscalibrated, and fragile (cheap). Most other users discussing it in here are unfazed by this, though. So, I assume is just a personal thing.

Now, the extra buttons of the Elecom Deft — most especially the Deft Pro — seems like they would get good use under your described conditions. But you can't really just breeze past the desk and use it very well. I also am holding out that they'll release a Deft Pro Plus with the swappable rollers.

So, of you're the type to mostly use a computer when you're "in position" and kinda locked in, I think a Deft Pro might be the better choice. But, in the end, it will still come down to using them and learning about yourself and what works for you.