Have you seen the P2D from Fenix? Essentially it's just a P1D Head with a clicky switch. It's slighlty longer (to fit the switch) but otherwise, the dimensions are similar. Also, if you're speaking of the old Luxeon P1 (and not the Cree P1D) the P2D will be brighter, as well. If you already have the Cree Edition, brightness should be the same.
P1D CE with Leef body from Lighthound is currently my favorite EDC as it is lighter and smaller in diameter than my Milky-modded Seoul HDS. P2D is a different animal with the reverse clicky, HDS/Novatac has no momentary function.
P1D CE with Leef body from Lighthound is currently my favorite EDC as it is lighter and smaller in diameter than my Milky-modded Seoul HDS. P2D is a different animal with the reverse clicky, HDS/Novatac has no momentary function.