i typically use one of my coach or dooney and bourke bags.. if i ruin it, it's less painful and easier to replace... both brands have pretty good quality so it hasn't been a problem so far..
A real Target is better than a fake anything. Never use fake. You aren't fake. You are real. You deserve the best. Life is too short to use fakes. There is a whole gamut of "reals" out there that can take the rain.