If you like the Vivi Nova and just want a
juice safe tank, you can do what I did and just get a metal tube for it. Several places have them separately or as part of a complete VN kit. The Vivi Nova can be rebuilt with your own coils and wicks too.
EDIT: Really, now that it is common knowledge that certain juices crack plastic tanks, I am not sure why the manufacturers haven't all gone to either metal or pyrex.