Im looking for a new mod I'm debating on getting either a dan or a yihi sx. Must be a 18650 device. I have had a Realuex dna 200 in the past i really liked it. I'm not going to use tc mainly just wattage mode and use either the tfv12 or tfv8 baby beast. Main thing I'm asking is which mod will hit smoother between the dna 200, the sx350, and sx550. Also the main differences.