Dinosaurs AND fine art, all for one price. This museum should be your first stop in Pittsburgh.
We spent a full afternoon exploring and came away thoroughly impressed. They have the best dinosaur exhibits probably in North America, including two T-Rex's. The geologic and gemstone collections were also extensive.
On the art side, there's a varied selection of modern and contemporary works, all well presented. There's several pieces of note, nothing too special you wouldn't find outside of NY, DC, or Philly, but combine it with dinosaurs and I'm sold.