The original Crown are my favorite and current tanks. I have two standard and two mini versions, different flavors in each. The original Crowns have a wide selection of coils available, each with their recommended wattage settings.
Original Uwell Crown Clearomizer Tank
I'm afraid I've never heard of the Sigelei Kaoz or Sirus mods. I'm admittedly biased against anything SMOK, myself.
As you plan on using your battery-hungry, wattage-sucking, juice-hog SMOK tanks you'll need a two or three battery, high wattage regulated mod. And make sure the batteries you use have the amps necessary for the wattage range you'll use.