To offer an alternative to the Kraken love, I would look at a Kayfun or Taifun clone from Vapegeek (UK) or Fasttech (China). Both give you the option of either a silica or cotton wick and a variety of coil styles. I have used the Kayfun, both original and clone and find it reliable and pretty leak resistant. Not tried the Taifun, but will do in the near future.
I love the look of the Kraken, but find genesis style atty's a right pain in the arse to build. Also they do need to be kept upright or they will leak.
Always remember that the atty (and build inside it) will have the biggest effect on how your juice tastes and produces vapour. For that reason, a "buget" atty will almost always cost more than a "budget" mod.