Hello and welcome to the forum. Glad to have you here!
If you are looking for an upgraded setup here are some possible options for you to consider:
1. JoyeTech Ego-C Twist
2. Vision Spinner
3. Innokin iTaste vv v3
4. Innokin iTaste MVP v2
The first 3 are fall into the "ego style" category of battery (with variable voltage). They range in size from 600mah to 1300mah. The higher the mah the longer the battery will last between charging. The 4th one is a step up from an "ego style" battery in that it is a smaller box mod with a very big battery (2600mah). It will last many vapers a whole day before it needs recharging. It is probably one of the most popular batteries for someone upgrading from an "ego style" battery. Some vapers choose to buy one "ego style" battery as a backup and also purchase the MVP for their main battery.
If you are going to buy an Ego type battery online, I suggest buying from
reputable e-cig vendors such as AltSmoke, Discount Vapors, My Vapor Store, etc. Buy only
name brand Joyetech Twist or
Vision Spinner ego batteries. BTW, "ego" is merely a type of battery, not a brand name. Buying "generic" ego batteries is always going to be hit or miss...mostly miss.
You will need to purchase a tank (the juice attachment) with the first three on the above list (unless you get a kit). The mini Nautillus, mini Aerotank or regular size Aerotank (all made of glass & all have adjustable airflow control) are very popular. The MVP Kit comes with a tank but it is not glass.