Ideally with your feet size you want a board that accommodate as much of the foot inside the board to avoid foot drag. The Ideal size of the waist of the board should be around 258, the never summer you are looking has a width of 256 I believe. That might be a bit narrow and therefore you could see some amount of drag probably from the heel or toe side.
As for the size a 161 sounds good to me, but you need a wider board. All manufactures have wide versions of their most common board/boards.
As I am all the way Rome rider, I am going to recommend the Rome slash 16, its a great board that you can grow on and advance into a better rider. The board is the wide version of the Agent that is what I have. Or if you want something a little stiffer you could always go for the Rome Flag, it's more toward an all mountain board than the Slash is.
But note never summer is a great company and they make incredible boards, just note that their boards tend to be a little stiffer than other brands. The premier looks like a good option for you, but I am not sure about the mid width.