I too am leaning towards TB and Long Box's. Here is another link you might explore if you haven't all ready....Full of great information., A lot to explore here....http://www.backyardhive.com/magazine/
. I am currently building a Langstroth Long box hive. Equivalent to a deep Lang. It holds 29 deep frames. I have designed it after Phil's KTBH. Only it's a Lang. ...I am from the Lake Superior Region of Wisconsin. Very cold and long winters here too. As of 4:30 pm, we have -3 F. Forecast tonight, -9. Tomorrow night, -10 with a high of -4 on Wednesday. Like I said, sort of cold here to. The reason I am building a long is it functions as a TB but I can still sell 5 frame Nucs out of it. I am going without foundation, allowing the bees to build there own comb, for many reasons. All this said, I believe any hive will work in our area's, just a matter of choice and how we manage them.