Ok, the Boge SR 3ohm cartos you will probably want to pass up as far as the KGO goes. At 3.7volts you will end up with a cooler draw and less vapor. You really don't want to use those until after you hit 4.5 volts or so. The Boge LR 2.0 is the 2 ohm cartomizer which will work great at 3.7 volts. The 1.7 ohm "ressurectors" (as they are referred to) are going to come in just under the 2.0, as far ohms go, but will somewhat simulate vaping at a higher voltage. They too work great with the KGO. I personally use both the LR Boge and 1.7 ohm cartos with my KGO and enjoy what it gives me!