Welcome to ECF , As long as the Twist is working for you , might as well stick with it awhile . At least your getting the benefit of varable voltage . Now there are several varable voltage , and wattage type mods out there , thare are fairly cheap , as APV prices go . There's The Vamo , or varable voltage and wattage Eg0 , that uses an 18650 battery . The big benefit to these , is a lot longer battery life . There's also the Evic , Vmax and Zmax , etc . And if money is not an issue , you can pick up a Provari . Very well made and dependable . Varable voltage only , but I find that I rarely use wattage , over voltage , but that may be just me . Good luck in your search .