Although the pieces can be rather expensive, I love going to La Garconne to look at inspirational pieces. Opening Ceremony has a great dress on the site. It's cute but not trendy. It's also available at shopbop.com.
I bought this 3.1 Phillip Lim linen dress. Pretty expensive so I might end up returning it, but it's a great piece. It looks sort plain on the hanger, but check it out on the model. Cute, eh?
Here's a somewhat affordable leather dress by Susana Monaco. I like how it ties. Wideneck, too. Can get a lot of wear out of this. Can wear it with and without tights.