I do know I am going all mediums, still don't know if they will be 10 frame or 8 frame
If you want mediums, the Mann Lake catalog number is PF-120. http://www.mannlakeltd.com/ProductDetail.asp?idproduct=2123&idCategory=48
Yes, if I were going to do Langstroth hives, I would do 8-frame mediums. I use long hives which involve even less heavy lifting.
If you can order packages or nucs composed of natural cell or small cell bees, that would be the way to go. But they are hard to find.