I started with a Green Smoke kit. My wife and her son joined me and got their own.
I upgraded to a VV eGo 1200 and mini vivi nova clearomizer and sold my GS kit.
They still use their cigalikes a month later and are content with them.
It helps that I bought tobacco juice and can't stand it so they get free refills.
OTOH I wish the Protanks came out before I got another mini nova and an iClear 30.
They are good but I have 2 Protanks and another on the way.
I won't go back to cartomizers.
If you want to upgrade I'd say eGo with a Protank and a few cartomizers.
Congrats on kicking cancersticks to the curb
This video that Baditute posted convinced me that it was simple enough to upgrade
There's a ton of good info in the InfoZone section linked to up at the top of every ecf page too.