Used to own an American Deluxe P V approx. ´01, and I liked the neck and general tone. BUT, it suffered from a week B-string. It also suffered from hideous shielding and flimsy pots that came off every now and then - but that had nothing to do with no. of strings
I've had the pleasure of playing a bass-colleagues Roscoe Beck V at one gig, and that was a different story: GREAT bass. I borrowed a Marcus Miller V for a week a couple of years ago, and liked the overall feel and sound - also from the B string. However, horrible shielding took me down memory lane in a bad way, and it went back 
