I haven't been impressed by OPI for a while but Marc Jacobs, whom I adore, seems to think otherwise. He chose some classic, subtle shades to complement his latest collection. See them here.
I'm a huge Essie fan but the colors I'm looking forward to the most is the new Orly collection. The world needs more green! Here is a glimpse at some Orly, Lipmann, and Essie fall colors.
Also, for any UK readers, check out this new drugstore brand called Eyeko. Non-UK readers won't entirely be missing out because they ship free worldwide! I'm already eyeing my order.