Any suggestions on outdoor speakers to mount on the walls of my porch. This will be new construction so I can run the wires now and not need wireless.

I would recommend a set of BOSE outdoor series speakers. They just give the best quality sound for the money. I think they make them wireless as well just in case you changed your mind on wires.

Don't skimp on wire size, Don't know length of run.
I would maybe run pair of speaker wires to box on wall outside, then up to speakers,
Then you could have volume control outside. Run a Cat 5 with it and you could add
To Multi Source/Multi Zone system. Use 2 gang box with extension ring, and single gang mudring. Can easily? Changed out to 2 gang later, if needed.
Would allow turning down volume, if phone rings.