I would wait for a bit. I never book very far in advance simply because I don't plan in advance. Last year I booked for the end of August in June. The fare was bouncing back and forth between $59 and $62 each way with AT. Of course I booked in the morning at $62 and later that day it was $59. Oh well no biggie.
I do watch the fare constantly, mainly out of curiousity, and what I see is that the first day or so that new dates are opened up the fares are the lowest. Then they go up for a while and drop back down. My basic rule is this...when you see a fare that you are OK with, book it. Sometimes you will luck out and get the best fare and other times you won't. If you travel often in the end it will all average out.