Fuel pressure at idle should be in the neighborhood of 35-45 psi. Some seem to think it is always on the high end. I've personally seen mine sitting mainly at 35 psi.
I think the stock FPR raises the fuel pressure only a few psi as the car sees load, but I'm not sure. I put my gauge on after I was boosted, so that changes everything.
Really wish I had had all my gauges before the install, that way I would have some before and after data, but there's that hindsight thing.