@viethluu
My experience of listening to B&W speakers were that they were a tad on the bright side. Is it possible to borrow an Aquarius to test it at your home? IMO, the Aquarius might work better with speakers and gears that are more laid back in sound.
Based on the sound you are looking for you might want to consider Audiobyte HydraVox. It is transparent, very detailed, and on the drier side, so I think it should be a very good match to your 805.