what a dilemma! as a 77 p-bass owner i'd stick with the fender, i actually got my natural 77 in trade for a black 78 (identical to the one you have) and it was a beaut (i wanted the natural one as it was my dream bass and had a certain mojo), the guy i traded with has a large collection of basses with a sadowsky 5 string in there. i'd say that having played them both, if i was allowed just one bass (for whatever reason) i'd go with the precision, but i wouldn't pass up the chance to add a sadowsky to the collection one day.