Ego 650 passthrough Joyetech, Mini Sigelei Zmax, Sigelei Zmax V2, Vamo. Playing cards, small battery 18350, larger battery 18650.
It really depends on what you want the Mini uses an 18350 battery, which normally run in 700 to 800 mah range. Full size Zmax uses 18650 which normally run in the 2000 to 2250 mah range.
Vamo does have the option of removing a section to use the smaller 18350, or using the 18650 in the form pictured.
Of course there is always the V3 Zmax which will take either of the above and the 18490/18500.
Zmax has a one button menu, Vamo has a three button menu.
I like my Vamo, but I like the Zmaxes even more, both do the same thing. Zmax just does it in a lighter and slightly smaller body. I also think the Sigelei Zmax is a little better made, but that is just my opinion. Either one will serve you well, no wrong choice here.
Fasttech has good deals on Vamo, Exhale is hard to beat for the Zmax mini, VaporTek USA also carries the Sigelei Zmax. No matter what you get, get a decent charger and IMR batteries.