Hi, been lurking and researching since 6-27-09.  Smoked last analog also on that day when my Greensmokes arrived.  Not happy with many aspects of the Greensmoke and I am thinking about purchasing the Janty Dura C or an equilvilent 510 such as Yeti, Joye or Titan.  I am getting confused on the idea of manual vs auto.  I think I understand that the manual is the one with the push button but it will not have a cherry light on the end.  At least that's the way Janty describes it, but some of the others describe the manaul button type as having a cherry light on the end.  Does anyone know the differences in the Janty Dura C vs Yeti, Joye 510 and Titan?  I would also like to get information on the USB passthrough devices that work on this style of e-cig.  Does anyone recommend one supplier's passthrough over anothers?  I saw where Puresmokers was advertising that theirs was sealed.  Help needed quickly please.  The Greensmokes just aren't that great.  Thanks - so much 