My suggestions are going to be expensive, but you will save money in the long run by purchasing them now because you will most likely buy them down the road. I'd say go with a Provari. It's just one of the best mods out. I have spent money on others and I have yet to find one that matches up. Also, you should look into a Phiniac tank. They are made of pyrex (glass), but they are virtually unbreakable. They are extremely easy to clean so you will not have to worry about contaminating your juices when you decide to change flavors. You won't have to worry about any juices ruining your tank either.