Parkes Vaping has some really good and inexpensive tanks.
I have 8 Chibi tanks, ( well 2 with me, ordered more and on the way tho)
I have 3 chibi tanks and they work very well, it would be nice if they would sell parts also-especially the seals(electrical grommet). The only leaking I have experienced is when I am filling them- which is probably common to all tanks like these- and I have filled them using a syringe and have filled them by pulling the seal most of the way out and when pressing the grommet back in, I will get a bit leaking out. After filling, absolutely no leaking and I have had mine 3 weeks or so, and at $8 each with a puched carto included, I can't complain
I just tried one of my vision extreme tanks(3.0 ohm) from gotvapes with an ego batt, and all I can say is WOW, and I tried it with 100% VG Boba's Bounty from avejuice.com that I liked a lot with the 2.0 ohm boge cartos. It is just day one with the vision extreme but they are pretty simple to fill and use. I probably let mine set for 1/2 hour after filling to use and not sure waiting is necessary especially if using PG since it should wick better and the vision extreme is a top coil setup