Finnair A321. How do I know? (Well, besides that I check the Cabin Photo section daily-- and much to my dismay it is rarely added to, as it is my favorite section--) For one, it has, as was said before, the curvy overhead bins of the A320 series. It also has the small airbii vinders. Also, Finnair currently has, I believe, only one airbus model-- the A321.
As a sidenote, when I first saw this pics months or several weeks ago (it has fallen back from the first page you get when you search for interiors), I marveled at the very business-like and professional decor of Finnair's A321.