Although the eGo and Riva are good "beginner" PV's, I think there are many better options for someone who "chain" vapes like yourself..
I'm going to lightly disagree with you wv2win. The main factor for chain vapors is wattage. With the new Special Edition Rivas that run 3.7v underload and the LR attys either 1.5 or 1.7 (tank attys) you're vaping at above 8 Watts and with the 1.5Ω atty above 9. While you can get that with 5 and 6 volt mods too you have to use higher resistance attys to keep from burning them out. For the price and availability - the Riva/eGo is more than just a 'beginner's kit'. Many vets are hooked on them after going through many different mods - me included