I second IBTanked. While I've never
actually vaped out of one (the tank I bought was used and was pretty much bonded on the molecular level to the cinnamon
juice the previous owner used -- I ended up giving it away), I've seen and handled one. Excellent quality and very, very pretty. They come in nice packaging, too, complete with spare o-rings.
As for me? I use plain ol' Smok polypropylene DCT tanks (both 3 ml and 6 ml), as well as the new Smok pyrex tanks (6 ml). I really hope Smok comes out with a 3 ml pyrex tank.
EDIT: I've been using Smoktech 2.0 ohm single-hole punched cartos for the past 9 months and I've had excellent experience with them. I've had ZERO problems with them wicking up Boba's (I do add one extra single hole on the other side myself). Zero leaking, zero flooding, excellent flavor and vapor production. Maybe it's because the polyfill in Smok cartos is a bit "looser" than the polyfill in Boges and Ikenvapes?)
EDIT 2: Now that I think about it, I doubt Smok would release a 3 ml pyrex tank. Wrap it in metal and it would still be rather top-heavy and not flush with your typical eGo battery. Oh, well. Gotta love them "beauty" collars.