I've done a whole lot of reading and research on the subject. Bought a book written by Thomas Keller,
"Under Pressure" it's all about sous vide.
One extremely important issue with sous vide is "safety". Sous vide can go terribly wrong if you do not have a full understanding of food safety. Sous vide can be a perfect technique to breed deadly bacteria. Before you start I would suggest you do your due diligence first.
What do you intend to use as a immersion heater/circulator?
http://www.cuisinetechnology.com/sou...circulator.php