my take on this... whichever makes YOU (the owner) happy... if you like to slap in aftermarket mags on it.. go for it.. if you'd like to put in cone filters boost gauges, boost controller etc.. and it will make you happy... go for it...
if you like to keep everything stock... including a 55amp alternator.. good for you.. you have the originality of the car preserved...
as for me.. i'd probably be in the middle. put in some nice upgrades.. including a voltmeter, but keep the overall look stock... i've got bundt rims by the way.. thinking of getting a steel rim with MB hubcaps.. ehehe... i might be going out my mind for thinking that..:-p
but it's all in the way my car would keep me happy.. if the mod i make to it makes me smile everytime i see the car. and it makes me drive it other than the OTHER car... well then.. i say its a good change..
IMO.