If I could be Spoo on a more conservative day that's be my ideal look.
One of the joys of becoming a theoretical physicist will be that in general everybody is just happy we're wearing pants, much less conservatively dressed. As things stand it is highly likely I will have the opportunity to remain unrestricted in developing my own personal style.
As for a recommendation, I recommend going out, trying alot of things on and seeing what you end up liking. When you find something you like and feels appropriate, buy that.