If you had a steel fork, I would suggest a Low Rider rack up front. Much nicer when going uphill, especially when loaded as the bike behaves very closely to when it is light. (None of the whole bike whipping around the handlebars when you rock it standing.)
I have been riding fixed with Low Riders for something like 30 years. If I absolutely have to put a rear rack on to carry something, it comes off as soon as that job is done. A drawback to Low Riders is that they have no suspension between them and the front wheel, so I would not put a laptop in them. They also require that you have a large enough and inflated enough front tire to avoid wheel damage when you hit potholes.
Ben