Gear Recs

I’m really torn on camera systems right now. I’m coming from shooting on Sony handy cam and wanting to check out one of these full frame mirrorless systems. Anyone here shot on the Nikon zr, Sony fx3, lumix s1ii, or the c50 which seem like the most prosumer options. I would mainly be building a portfolio that is going to include a spec ad for a brand (non paid) and documentary work. If there are other systems you’ve used for spec ad or documentary work I would love to hear as well.