Oh, Wolfn, I would like to place a vote for N. singalana. The pitchers on it are great, and toothy. And don't worry about it overgrowing the terrarium for a while, mine seems to grow at a glacial rate. In the last month I have had it, it has put out one leaf, while my N. ventricosa has put out 4 leaves and 2 pitchers (3rd one starting), and the N. spectalabis x aristolochiodes has put out 2 leaves and is inflating two pitchers. All in the same tank.