B cracker, I thought I'd want to stick to the smaller units myself, but found I just couldn't get the hit I needed. I'm using Mad Vapes Maxi Roughstack now, (They have an affordable kit) with dual coil 1.5 ohm mega carts. I get the hit I need. Carts hold lots of juice, and battery life is good. I have an EGO kit I just bought to use when traveling, but it isn't delivering the warm full vapor I seem to need to feel satisfied. Until I started using the stronger mod, and higher voltages, it just wasn't working for me. Once I started with these, I haven't had ANY desire to smoke analogs - even though there's a pack sitting right next to me.
Juice matters a lot too. I went to BackWoodsBrew juices (currently Malty or Honey Flue with a touch of watermelon) to give me a juice that's "thick" enough, if that makes sense. I also almost immediately went to 24 mg nic, as anything lower means I'm vaping non stop. Now I vape the way I smoked. five or six good hits every half hour or so.
I'm totally getting a REO or another bottom feeder to try too. The idea of no refilling sounds heavenly.
Good luck, and keep trying until you find your happy place.
Another thought - there's a place now selling WTA (whole tobacco alcoloids) that's just starting out. You might be missing some of those. There's a great thread devoted to the subject here. pm me, and I'll let you know once I get some if it helps when vaping at lower voltages.