re: Monday C&D

which one of you baws wants to give me a crash course on echips for my gps. probably going to make a thread about it in the morning if not.
my gps unit isnt the best, so do i need to upgrade it before i can get a chip?
will the chip make the gps look more like google earth (satelite image)?
where can i buy one..etc
if im launching from grand isle but sometimes running almost to leeville will one chip be enough ?

this is all new to me, ive always just mapped it out in my mind using my printed map..having the satelite image on the actual gps would be great

thanks