More information from you would help.
What battery device do you plan on putting this tank on? Does it matter what the diameter of the tank is?
Do you want the tube to be polycarbonate, pyrex, or stainless steel?
What cartomizer do you wish to use in your tank?
Do you prefer metal, delrin, or acrylic end caps?
I like the Triple V pyrex tubed tanks from Vallely View Vapors
Triple V Pyrex Economy Tanks, but I would only recommend them if the vendor has either the delrin or metal endcaps available. I can't recommend these tanks with the standard silicone grommet, as they have to be filled with a needle inserted between the glass and grommet. With the aluminum or delrin endcaps, they can be filled like any other carto tank.
These are wide tanks at 1 inch diameter (width of a Silver Bullet), but at 4ml and 7ml they have a higher than usual juice capacity compared to other pyrex tanks. Pretty economically priced, at under $25 for the clear tanks with metal caps. Consider that you can pick up two of these to one Phiniac. Below are some pics of a my Triple V tanks on a SB and BB, clear and frosted.
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I have one Phiniac tube on a Bella Elegance tank from Hoosier Vapors. Only the clear Phiniac tubes will fit on these tanks. It was color sandblasted with one of their designs. The Bella tanks are very similar to the lava tanks and JonboyUSMC acrylic tanks, the mouthpiece and top cap are one piece, which unscrews to fill the tank. Mine takes an XL carto being that the Phiniac tube is an XL 45mm length. My most expensive and prized tank.
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I don't have any experience with the Big Daddy Tank, but I know that it comes with either polycarbonate or ss tubes. I highly recommend their tank accessory tool.