I have been vaping since 2013 and I think it is finally time that I move on to a rebuildable set up. I am at a loss on what to buy to get started. I know I want an RDA and I don't want the mod to be mechanical or big. I currently use the iStick Pico and would like something about that size. Can anyone suggest a good RDA and mod (the cheaper the better). Thanks in advance.