If you go with an eGo/Riva, get the Boge 510 2ohm cartomizers...work great with them and easy.
If you have gotten to the point that you don't care if it looks even vaguely like a cig, and you want all day vaping with no muss and fuss, plus ability to go 3.7 volt or 6 volt, and are prepared to spend $140, get a REO Grand.
If you have gotten to the point that you don't care if it looks even vaguely like a cig, and you want all day vaping with no muss and fuss, plus ability to go 3.7 volt or 6 volt, and are prepared to spend $140, get a REO Grand.