School me on Magnums

As the title states I need schooled. I am thinking about buying a Magnum to go along with my 77 Doba and 05 Magnum R/T. I tired searching this forum and the web but did not get much. I am looking for info like rare colors, color combos, options, etc. Differences between XE and GT. Were the GT stripes standard or an option on GTs. You get the idea--right? Links to web sites would be great, if ya got them.

TIA
Author: XCELLR8