I was thinking I would get better taste and more TH and more vapor from it, correct me if I'm wrong. I know the battery would last longer and I love the tank idea without carting my bottles around. I will look into the j tank. Thanks for the reply
The eGo is only 3.4 volts so you won't be getting better throat hit. It is wise, however, to get a better battery model over what you currently have. The larger the mAh rating of a battery, the longer it stays at or near full charge which will provide warmer vapor longer and thus better throat hit.
Instead of the ego, I would look at other models in this category that are also 510 models. Specifically the E-Power and the Kgo. Both of these are the same size as the ego but are 3.7 volt models instead of the ego's smaller 3.4 volts. Plus their mAh rating is 1000+ whereas the ego's standard battery is only 650 mAh.
The tank will not give you better throat hit. There have been many mixed reviews on tanks. (plastic taste issues, leaking, etc) You can buy one tank and use it on an E-Power or Kgo and then compare it to regular cartomizers, etc. You don't have to buy a model that comes with a tank.
Here are several well supported suppliers for the E-Power and Kgo:
Electronic Cigarette - Starter Kits - EGO E-Power
e-Power
KGO 1100 mAh 2 battery kit
The E-Power also not comes in a 5 volt version which will definitely give you more throat hit than any 3.7 volt model.