Machine choice help please Sous Vide Supreme or Demi?

I have the demi as I wanted to try SV cooking before committing to a greater expense. It is not large enough to cook for 6 people IMHO. I'll be buying a PolyScience SV Professional once I have absolutely exhausted the possibilities of the Demi but I would not recommend it as it really cannot cook that much and if you fill it with too much, it cannot maintain the same temperature throughout. Hope this helps.

I have the demi. There's only two people in my household, however whenever we use it, we cook enough for leftovers throughout the week. So I think it could possible feed 4 people. I think it depends on how often you plan to cook sousvide, and obviously how much your family eats. It can easily cook 6 chicken breasts at once. We also cook large bags of veggies.

I debated between the full size and the demi as well. If you're able to shop from costco.com, they have a full sousvide demi kit which includes a vacuum sealer and bags for an affordable price. Since I am still new to sousvide, I wants to get a full setup without investing too much money before deciding if I really liked to cook sous vide.

http://www.costco.com/Browse/Product.aspx?Prodid=11605673&search=sous%20vide%20supreme&topnav=&Mo=0&cm_re=1_en-_-Top_Left_Nav-_-Top_search&lang=en-US&Nr=P_CatalogName:BC&N=5000043&whse=BC&Dx=mode%20matchallpartial&Ntk=Text_Search&Dr=P_CatalogName:BC&Ne=4000000&D=sous%20vide%20supreme&Ntt=sous%20vide%20supreme&No=0&Nty=1&Ntx=mode%20matchallpartial