I got the '04 GTS w/out the Action Package (which was changed from the '01 to '03 Action package with slightly different side skirts, bumpers & completely different spoiler). The Action Package also had a different name in early '04.
...the price difference for the Action Package GTS vs. the regular is actually closer to $1,500... not $500. They had a yellow GTS or a black GTS w/ Action... I chose the yellow because the color was 10x better & already had a black.
I like the spoiler for the '04 action package better because it flows nicer than the Action PAckage/TRD
spoiler for the '01 - '03, but I cannot seem to find anywhere that sells it!