My understanding is that the only difference between ANY upgraded (to SE) model and an original SE is the age of the cabinet and the mid and bass drivers. Tweeter and electronics are replaced in entirety.
If you can afford it, probably a great move for older 8k owners.
Edit: Oh, and the driver rings, of course.
Do you have further info about that the PS (the two transformers and some capacitors behind the metal plate where the power line get connected) are included in the upgrade as that is also "electronic".
If so, it's a good opportunity to change also the mains voltages if that is needed.