I also only own the '57 model but I wanted to add that
not all the '57 AV RI's have the raised poles. No idea how Fender did this but my '01 has the raised poles but my '97 does not.
The current replacement pups (according to Fender) are called "Original" and they also do not have the raised poles.
I started a thread for the AV's if anyone wants to post up stuff about them (especially pics!), please do.
I love the '57 AV's. The necks are perfect (for me) and they just sound "right" (to me).
http://www.talkbass.com/forum/showthread.php?t=523621