Jake
I run a separate regulator for the nitrous, but run a separate electric fuel pump too. I'm just using a cheapy Holley and so far (luckily) it's worked fine. I know they're pieces o crap but I had it on hand so plumbed it in.
Most the nitrous kits call for 5 or 6 psi (which I'm sure you're already aware). I'd wholeheartedly agree with em, and use the dedicated regulator along with the low fuel pressure cutoff just in case.