Return style pressure regulator.

I'm collecting parts for the fuel system for my Magnum EFI project. I will build a return style system with the regulator at the firewall. I've used Aeromotive products in the past, but was wondering what else you folks would recommend. What I liked about the ones I've used is that if I wanted to go back to a carb, I could just use a different spring to reduce the pressure down for a carb application.

So, what's out there? What works?