The Nautilus is pretty new to the market, but folks seem to like it for the most part. Mine should be here tomorrow, and I wish I already had it to talk more about it. I'm looking forward to trying it out.
The Aurora BFT's been around for a few months, and has its fans. Again, I don't have one, but I will say that with a good 510 atomizer on top, it should be a pretty decent performer.
I'm not sure how the plastic would hold up with some of the "
tank killer" juices, but at least spare bottles can be had for cheap.