Hi i'm a Canadian from Québec city. Here in winter(4 month) the average temp. was minus 10 to minus 30. here the brand that we have (jacuzzi , sundance , saratoga , sunrise , artesian , beachcomber , bullfrog , dynastie , hydropool , vita , coast spa , artic spa , elite , cal spa ) all these brand was sell by good reputation dealer. Have wet tested some of them but also need help from pro. I think in this case i'm better not by a full-foam but the most interesting are. Here the artic spa , bullfrog , beachcomber and dynastie was very pricy. Mostly just 2 in the spa but very often. Sorry for my english , after 6 month of searching , reviewing and everything i'm very confused and my wife too. I just want to know your opinion please.