Of course, room size and source are vital criteria for any speaker choice. In my 21 X 13 X 8 room with an analog front end, the Audio Physic Scorpio speakers deliver outstanding synergy with the VK-55. Similar to most audiophiles on the 'gon I'm quite selective and this combo produces a degree of detail that is lush, fully fleshed out and involving. AP is known for their huge sound stage and the width, height and front to back depth are really quite exceptional. The bass, 4 7" drivers, is rock solid and produces chest-thumping slam. Obviously, there are many speaker choices and this pairing is IMO, extraordinary.