Price range? A bottom feeder box mod has several advantages. High juice capacity. An 18650 battery box mod is much smaller than a tube with the same size battery in most cases. They feel good in your hand, more so than you'd think coming from a tube mod. I got a Reo Grande a few months back and I absolutely love it. I's much smaller in person than you may think. And even though I spent way more for my tube mod, the Reo gets 95%+ of my vape time. Plus a 6 mil juice capacity means I can leave the house all day and it's one less thing I have to carry around with me. The tube may hit harder, but the Reo wins hands down for convenience. It's like all the good things about dripping in an rda without all the mess of actually having to drip.