So I gotta admit I really dig the name New York Sirens. I like the double meaning - both the mythical, all-female Sirens, but the blaring sirens of the NYPD and NYFD. It gives a really straight-forward logo of, well, a police flashing light (even if you want to get technical the siren is the sound, not the lights).
The other names don't do it so much for me. Fleet is okay, again with the double meaning (both meaning "fast" and a literal fleet), Frost is okay but a little too predictable (I think someone said it sounds like a videogame create-a-team name), Victoire de Montreal is meh (though I like the old-fashioned looking logo), and beyond that what the hell is the Toronto Sceptre supposed to mean, and Ottawa Charge just looks cribbed off the Calgary Flames.