Philharmonic AA if you have space around the speakers (especially behind), KEF Q100 if you have to have them up against a wall. The KEF is front ported, the AA is rear ported.
The new Q150 is noticeably more extended in the high end without ever being bright, and extends bass a little deeper. It's a personal thing to say it's worth more than twice the money. The original price of Q100 was $550 a pair and included the grilles and dual binding posts (which few people really need or use correctly.) The new Q150 puts the Uni-Q driver at the center of the front baffle, moves the port to the rear, deletes the dual binding posts, and makes the grilles magnetic and optional for the same $550 in exchange for better sound quality.