I'm using a Walbro High Pressure pump in my car, a crappy (I think) Vortech RRFPR, and the stock fuel regulator. Right now my car idles at 48-52 psi, depending on how long I drive it. It seems the idle goes lower if I drive it for longer (maybe the pump is getting tired?). I don't really like my idle, as it seems to be too high, though I have not had any problems related to it being a high pressure.
On boost, at full around 4 psi, I see anywhere from 4 BAR to 4.5 BAR of fuel pressure. This converts to 58.8 psi and 66.2 psi. This seems to be fine for on boost fuel, as my EGT's rarely go above 800 C (1472* Farenheit). To be honest, I have no idea which pressure plate I have in my Vortech, as they are not listed on the different plates. I just picked one out of the bag of plates I have and put it in. I think its an 8:1 plate, I don't know.