For that particular size you have, either one would fit. Though the WP8 do require a large soundstange from how they handle, if going with the Sophia you would be fine. Our room we actually have both the Sophia and Sasha Watt Puppy, both sound excellent and smooth on the midrage, though the Sasha does have a slight better dynamics to its sound, but keep in mind we also you sound reflectors in the room to keep sound as accuarte as possible. Where do you live?