Arsenal-Southampton should be a lot more competitive imo. They played ok against Man City and should compete against Arsenal.
Arsenal should control tempo 1st half. They will have plenty of passing around the box, but probably won't do much with it as they do this every game.
Southampton only conceded 9 goals, best in the league, and i'm not too fond of the Arsenal offense.
Anyways, if it's close late, I think Arsenal will sit back and give them plenty of chances to tie it.
I'm still taking Arsenal to win @ home.