I'd of course have a biased opinion, being a happy KEF owner. Between those two, the KEF Q100 is a really good speaker and though your room is open they would perform as well or better than the Philharmonic AA's in the area you'd be using them. They can put out up to about 107dB and are of about the same sensitivity as the AA's. The AA's would definitely give more bass, but not a huge factor if a subwoofer is in play. The midrange might be more detailed, the tweeter a tiny bit more subdued.
Another difference is that they are front ported, so you could easily place the closer to a wall or even mount to a wall. Given the list price of Q100's right now is $549 a pair, you probably have quite a bargain on your hands. Do looks matter? Grills on the Q100's are rather conservative, while off it's quite a different look.