Remodeling Bathroom

Hi all, I am all in on the Wiim universe - Wiim Amp Pro with a pair of bookshelf speakers and amp, 2 Audio Pro speakers to move around the house.

I'm converting my half bath into a full bath and it occured to me that since I will need to frame our a wall and modify the electrical, I could put some built in speakers that would be on each side of this new wall (one facing into the bathroom and one facing out into the owner's bedroom. This bathroom even shared a wall with the other bathroom in the house so I could even add a third speaker there.

Now for my question...

Do I get something like the Herdio system (has a built in amp and aux in) and connect a Wiim Mini to it? This would require 2 electrical outlets and I'm not quite sure how the stereo/mono would work with the mini.

Or do I do 3 passive speakers, speaker wire and another Wiim Amp? And wore 2 speakers into one of the outputs?

Or is there another solution I haven't thought of? I could always just get a couple of outlets installed and put an Audio Pro there.