I've never driven a car with a speed limiter, only ones with speed warnings. If like a speed warning, the speed limiter has only one setting that requires a trip thro the settings hierarchy to change it, I should have thought that cruise control would be a better way of staying legal because all the cruise controls I've ever used could be reset to a new speed with one touch, allowing them to be changed easily as the speed limit changes. By contrast a single setting speed control, unless easily reset on the move, is only really useful for the highest speed limit which will be encountered. Using cruise to stay legal has a couple of other advantages, it's easily overridden to go faster if safety requires (eg to shorten what might be protracted overtaking where there is no escape route) and a constant speed will usually be more efficient.
The other option would be to configure the max speed for Eco Pro to whatever you normally use on your speed limiter. If I've understood the manual correctly, from a safety viewpoint, this has the advantage that it can be overidden instantly if necessary by flooring the accelerator just as you would for kickdown on an auto.
i3 REx ordered 7 Feb 2014, delivered 8 Oct 2014