Which adjustable fuel regulator?

Im thinking of buying an adjustable fuel regulator now while i have no "Real" mods. Im thinking mines shot anyway. I was thinking about the aeromotive or BBK. Is there really any difference in a regulator? Im planning on doing some more serious mods as the money becomes available like headers, x pipe, and eventually the TDC twin turbo kit. Also has anyone ever used a TB spacer? I know how it works but it doesnt sound like it do much good on a MPI vehicle like it will on a TBI.