Hi and welcome to the Pool Forum!

This is entirely an opinion question. But, just a few comments for you.

You do realize that saltwater pools are still chlorine pools, right?

Also, you still will at times have to add chlorine manually. It is best not to use your unit to superchlorinate as it shortens the life of the cell. Best to manually add chlorine anytime you need to shock the pool.

It is always good to get an over-sized unit as that will give you longer use of it.

CarlD, another of the moderators, added a SWCG to his pool a year or so ago. Hopefully, he will chime in here and add some more information for you.