You mentioned you already have the istick 50w? If that's the case then you really don't need to buy another mod. You could just by the Aspire nautilus (full size or mini) tank and you're good to go. That way you have something you know you can use right now and also have the subtank for later when you desire more vapor. Win-Win
This what I would do. The 50w may be bigger but I believe it has twice the battery life than the 30w. You can also use it with just about any atomizer.
