Trip to South America sounds fun!
Have a great, safe trip!
As others have said, the Olympia brand is wonderful quality. I have the women's Olympia Airglide pants and jackets, and love them. The removable liners are nice, and the venting through the mesh panels gets a lot of air moving to cool you down.
And, yes, definitely buy gear designed for women. Men's gear isn't cut to fit a woman's body and you could find the jacket and pants bunching in very inconvenient places.
I also have the Daytona Ladystar boots; they're fantastic for all around protection for ankles and shins and they give you around 2 inches of extra height which is helpful if you're fun-sized!
Good luck with the gear search and the ride! Let us know how it goes.