Yes, Kent brushes are a source, picked up one of their 'seconds' via eBay and it works great (two sided, one for cashmere or softer piles, other a bit stiffer bristles).
Certainly brush afterwards to shake off the dirt/dust (before wear if they've been in storage, but probably not necessary if you're rotating them). I suspect the ones from the Hangar Project will do the trick too.
I'm for minimizing dry cleaning too.
Perfect. I will look them up. Do you brush just outside or inside as well? I assume there's different thickness/strengths depending on the cloth