What's the distance between your intended speaker placement and your primary listening position? Are you interested in speakers with higher sensitivity?
Don't sweat the equipment you have. That equipment ought to be fine regardless of the speakers you choose. Good sound comes from good speakers. There's no need to overspend on electronics. And with your Parasound amp pushing out 275W@8Ω or 400W@4Ω, you will still be able to drive even low-sensitivity speakers to satisfactory levels with enough overhead to handle peaks without clipping.
Unless you're in an extreme environment or looking for dance club level output, the Phil 3 speakers
@tyhjaarpa linked ought to be at the top of your list. If, however, you're looking for a frightening level of output, then maybe
some JTR speakers would be more what you're looking for.
If you aren't crazy about the separate enclosures of the Phil 3s or the industrial finish of the JTRs, you might also consider the
Salk Song3 or
Veracity towers.
The B&W speakers you're considering have a rather disappointing dip at 5kHz. The Sonus Fabers could be a bit edgy with some tweeter misbehavior at 10kHz. They're both certainly pretty, though.