Hi and welcome. I don't use prefab coil tanks, I build everything. In that regime, the Lemo2, a single coil tank, has the best top fill I have ever seen and is an extremely versatile all around tank. In a dual coil, mid power tank, I like the Fogger V6. For higher power, I use the Indulgence MT (currently my favorite tank) and the Advken Ωega. My woman is a tootle puffer, and she has stolen my Kayfun V4 (single coil), which is superior in the high Ω, low watt range. I own and have used all of the above and can vouch for them.