Definitely Polo-style shirts... and ball caps, too!
No offense, Pat, but too many people use a "Got _________" slogan; it's just become way overused IMHO.
I don't know if it's ever been official, but I kinda thought that the GFC slogan was always "We Drive Excitement" so I'd stick with that, or just do something like the Fiero logo with "MEMBER" under it.
Color... now that's an interesting (and important) question!
Charlie's comments about dye-sub in consideration, I wish we could somehow do a really bright color???
FGTB