Why single chainring? I admit I am an old geezer, but just to keep chain line issues to a minimun I would build it with three. I do sometimes need the granny to get up steep hills when I am hot and tired. I also consider 36 spokes minimum for me, but I am 6'2" and 265. I like the Fusion rims. They have enough depth to be stiff and strong, without the weight of the Deep V. I also really like the BB7 brakes. I put them on my Vaya and they work great. Even with the road version of the BB7 they pull a lot of cable. Be sure your brake levers are up to it. I prefer drop bars myself, but a few years ago I finally discovered in-line brake levers. I have them on all my bikes now. If you are going with flat bars, you will have the equivalent anyway. I have been sitting my butt on Brooks B-17 seats for over 40 yrs. They take break-in, but it is worth it. When I was commuting by bike, the route I took had lots of tree roots and frost heaves to contend with. I needed the fattest tires I could get to keep from damaging rims. 700x37c worked for me. You are lighter and if your route is smoother, 32 should be fine. Looks cool!