I have a Panasonic SC-BT230 which to be honest I can't fault, went for it as it was pretty well reviewed, integrated seamlessly with our Panasonic TV and passed the 'other half' test. It replaced a big box system based around a Marantz amp and some Bookshelf speakers, we don't have the perfect setup (TV in a corner, sit at an angle to the screen) but I can't fault it for quality of sound or the fullness. The picture quality from blu-ray is excellent and the upscalling from DVD is equally good. The added bonus is that it sounds surprisingly good with music.
It took me ages to accept going for the one box solution and the sub sat setup after years of having full size speakers and seperates but I certainly wouldn't go back unless it was for a dedicated cinema room, the living room looks so much more spacious, homely and clutter free and that is afterall what it is a living room.
(I do still have a decent seperates system for music in another room!)