Pants are BIG this season, literally. They are wide, spacious (read comfortable) rich in fabric, texture and/or color. All you need is a good pair to make it a great outfit.
If you ask me, get two pairs: one simple, basic color and cut that goes with anything for an office day look and one luxurious, rich in texture and color for an evening look. Pair it with some basic, fine sweaters, not too tight, I prefer mens. It will look and feel great.
Here is some inspiration: