Seems kinda low for my tastes, but i ride 47/16. One thing i noticed about my ratio is that things like doing hills or stop and go was a pain, but you get over that in a few weeks. Going for path rides or longer/higher avg speed rides is way easier, for obvious reasons. I've found that having more gear inches tends to help with things like riding green lights/moving with traffic across town with less effort, whereas fewer gear inches tends to burn me out faster (moreso even than dealing with stop and go).
Unless you live in the hills, you may want to step it up a bit, maybe keep a 14 in the back when you switch to fixed at first, then adjust after a few weeks if you run into problems... if you're riding a front brake, you'll hardly notice the difference after the first two or three days. In fact, you're probably going to feel like you need a bigger chainring.