I'm assuming you're accepting clearomizer tanks in addition to RTA's and RBA's.
You'll see me frequently recommending the original Uwell Crown clearomizer tank on ECF. It's a remarkably simple and versatile clearomizer for just about any style vaper. Although technically it is a sub-ohm tank, the Crown 1 offers 1.2 ohm coils for those who do not sub-ohm. Coils available are:
- 0.15 ohm Dual Ni200 Nickel Uwell Crown Sub-Ohm Coil - 400 to 600 Degrees Fahrenheit
- 0.25 ohm Dual Stainless Steel Uwell Crown Sub-Ohm Coil - 80 to 120W
- 0.5 ohm Dual Stainless Steel Uwell Crown Sub-Ohm Coil - 30 to 80W
- 1.2 ohm Single Stainless Steel Uwell Crown Coil - 10 to 30W
Coils have consistantly lasted me about 4 weeks using a 100% vg e-liquid. I prefer vaping at 30 - 40 watts so I prefer the 0.5 ohm coils.
The Crown 1 is an easy top fill tank with a 4 ml liquid capacity. A shorter Mini Crown version has a 2 ml capacity. The ratcheted air control ring will adapt from a restricted MTL style to a wide open DTL draw. It comes with a wide bore stainless steel drip tip. If you are a MTL vaper I'd recommend replacing the stock tip with a narrow bore tip. I'm not a fan of metal drip tips so I replaced mine with a Cherry Vapes Cloud Chaser delrin tip. The Crown has a 22mm diameter. Available in stainless steel and black.
The Crown 1 does have a rebuildable base available that can be purchased separately, but the deck is quite small and the base is expensive ($10).
The original Crown can be found on most online websites for under $25 and comes with 3 coils and replacement glass. Replacement coils are also easily available online and cost $10 for a pack of four. Both can be found cheaper at Fast Tech.
I won't comment much on the other Crown tanks available. The Crown 2 seemed to be a disappointment. I've seen mixed reviews for the Crown 3 and Valarian.
In conclusion, I rate this tank a 4.5 out of 5. It is the first clearo tank that can match the flavor and vapor production of my Velocity RDA, without the hassle of having to rewick the dripper every 3 - 4 days. Aside from refilling once a day, maintanance is merely replacing the drop-in coil once a month. I would have given it a 5 rating if the accessory RBA base was less expensive and have a larger deck (which I'm not sure I would even use).