I would scratch the Maggies and Fluance off the list. Maggies are not for you, they are not a R&R speaker and take some big power to push. The Fluance I have not heard good things about although I've never heard them personally.

In general I prefer Paradigm over B&W, however, the Atom last I saw only was rated to go down around 90 Hz which leaves a lot of bass information lost. I don't normally recommend Klipsch to people but you might want to give them a listen to see what you think. They are very efficient which means they will play loud without big power and they are generally good matches for lower power and vintage gear, especially Metal heads The B&W will offer overall better sound but you may prefer the raw bite and kick of the Klipsch. Depends on what type of system you are putting together. If to pair with a Cambridge to achieve best sound the B&W would be your best bet, if you wanted something to rock in place of the Mach's give the Klipsch a listen.