I have experience with zero lag video-microscopes. They are pretty good. If you have your bench already setup for it, I don't see huge downside. Depth of perception is overrated. If your soldering head is too high, it will be out of focus, anyway. It's the lag that is more important to me, and with the right camera, the lag is potentially imperceptible. They are easier to setup for recording video and taking pictures, as well. Looking away at the monitor might be awkward, but you can set up your bench to make it ergonomic.
I use Amscope, personally. But I wouldn't mind having both.
As far as the lens, I can offer the specs of a the prototypical Amscope for electronics repair. IMO, it has 3-22.5X zoom and about 6" distance between the Barlow and the circuit board. (8" focal distance, but part of that is taken up by the barlow lens and lighting ring).