I have been using the kr808d1 and have been smoke free for almost 4months. I am considering purchasing a new model. I need some opinions on what is a step up from the 808. I want a good throat hit, a good amount of vapor, and easy to refill cartos. Also something that is popular so hopefully cartos can be ordered from numerous sites. I've been using LiteCigusa (and Ive been happy)but they are currently out of my cartos and will be for 5 more weeks. Also does anyone know of any other sites that have 808 cartos cheaper than Litecigusa? Thanks for info