Gasoline....low, mid or premium

[Jerrymac]

I have a 05 Nomad, 20k area on ticker... only mods are Vance n Hines Bagger Pipes and a cobra fuel processor, <<-- try to remember to put that at beginning of all crazy question threds ....
Just wondering what most of you use when you top off your tank, regular, mid grade or premium....there is a little station that sells pure premium gas, no ethanol at all, close to the house, would you run that over regular gas...i have heard that low grade gas is just as good to run in one as premium...but ya read so much it gets confusing sometimes, at least i have only tried to put diesel in it once....