I have a B Agile and just got an umbrella. I love my B Agile and use that as my main stroller. It reclines, has a great canopy and storage, is light and super easy to fold. It does take up a lot of my trunk space, but it folds pretty flat. Great in the mall, probably not in the city.
The thing about the umbrella stroller is that you can fold it up and throw it over your shoulder (if it has a strap) if you need to hop on a bus, train, escalator, etc. Great in the city, ok in the mall.