I generally recommend a general progression from eGo to regulated mods before getting a mechanical mod. Something like an MVP2 which will continue to have the variable voltage option like your eGo, but just as important have built-in protection circuitry to keep you out of harms way.
A mechanical mod has no protection or safeguards like a regulated mod will have. With a mechanical mod you will be vulnerable to atomizer short circuits, 510 connector short circuits, firing button shorts, auto-firing fire buttons, and over-discharging the battery. All of which can cause a battery to go into thermal runaway. Since a regulated mods artificial intelligence can sense these conditions, it will prevent itself from firing the coil to protect itself and you.