So im getting my first car soon. Its going to be a Ford Crown Victoria P71. Dont know what year yet but hopefully nothing older then a 99. I know i'll have enough for the car itself, but the real question is is what to get first, rims or a system?

Its been bothering me for a while and was just wondering what everyone else though..

To P-Nut, it will be decked if I add the system first. Either 2 or 3 15"s or 3 12"s. Whatever fits in the trunk. Haha. Touch screen head unit, Amps, speakers, Power Horns.. pretty much the works.