^ Sprint Center is another one that is meant to stand alone as opposed to being well integrated with its surroundings, but I'd let it off the hook since it looks so good. Really original arena design (so far as I'm aware, unless it's modelled on something abroad?) and attractive lines all around.
While we're on the subject of nice-looking arenas without major league teams, here's Tulsa's 19,199 seat BOK Center. Home of the minor league affiliate to Winnipeg's minor league affiliate. Possibly the only case where the ECHL team has a more impressive rink than the NHL and AHL clubs. A gorgeous building in spite of the fact that it really cuts itself off from its surrounding area... although its spiritual descendant Rogers Place is not quite as nice as this joint on the outside, I'd say Rogers certainly beats it when it comes to integration with the urban environment.

source:thelostogle.com