I have been doing some research on different vaping devices, such as the "killer 705" atomizer, the "amp tank", the "reactor" (i think) or "lavagen rebuildable" from vaperfexion, and some other "high-end" devices - most of the ones I saw weren't in stock(go figure)....but these aren't really cartomizer and aren't just rba's, but what are they and do they produce a better vape than the carto's I use or the aga?