Currently using Ikenvape Platinums, mega sized (45mm), punched, in an IBTanked. Just yesterday I got my second batch in, along with some 801 Fusions that I have heard so much about. The Fusions need a 510-to-801 adaptor. (Ikenvape's adaptor was out-of-stock so I found some at Mad Vapes for $2.50 each.).
https://www.ikenvape.com/SearchResults.asp?Cat=1860
I really enjoy the flavor production of the Ikenvapes. They also seem to last at least another tankful longer than the Smokteks that I was using before. Pretty impressed with this brand so far. No duds yet, and no wicking or flooding issues. Ohm ratings have been consistant within 0.1 ohm under load when tested on the Provari's ohm meter.
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Prior to that I had been using Smoktek's from here:
510 Tank Cartomizers
I personally prefer the single coils over the dual coils. I sometimes got a burnt taste with the dual coils, and have stopped using them. I admit that I prefer a cooler vape. I've used the 2.0 ohm on 3.7v devices and 3.0 ohm on my Provari. The single laser-drilled hole is adequate for the majority of liquids. Any juices that have over 40% vg I used the 2 hole cartos.
These are a pretty good carto brand. Generally provide good flavor. In perhaps 30 or so cartos, I've had two complete duds that I couldn't get any airflow out of. I've had one carto flood on me despite good technique. Ohm ratings have been consistant within 0.2 ohm under load when tested with a Provari's ohm reader.
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I've used some standard size Boges in the couple of short tanks that I have. I haven't been impressed with them, but I got my small supply during Bogate. They likely will be put away for the Zombie Appocolypse and be replaced by some STD size Ikenvapes that I just got but haven't gotten around to trying yet.