Rather than using a physical music docking system, Bluetooth speakers can be used in the home for streaming music from your Bluetooth compatible device without the need for wires. There are also portable versions that have built-in re-chargeable batteries so you can wirelessly listen and share your music anywhere.
Bluetooth speakers also make an excellent music accessory that can be used with a wide range of portable devices like laptops, tablets, PMPs -- many also have an alternative headphone 3.5mm socket when using older gadgets that don't support Bluetooth.
If you're looking for a Bluetooth speaker system that outputs high quality stereo that can fill any room, then the Jawbone Jambox is worth a serious look. Considering it's small enough to carry around, the unit produces big sound that has plenty of bass and definition in the mid to high frequencies. Like any portable speaker it has an integrated rechargeable battery with a reported life of up to 10 hours between charges. For wired portable devices that don't have Bluetooth, the Jambox also sports a 3.5mm input making connections to older equipment simple. There's also a neat speaker phone facility so you can speak to people using your Bluetooth phone. Overall, the Jawbone Jambox may not be the cheapest Bluetooth speaker solution, but it's a top audio performer that looks good too.
The Monster ClarityHD Micro Speaker 100 is a precision Bluetooth stereo system that has a small footprint, but is very capable in the audio department. Sporting two 35mm drivers it produces great sound -- bass frequencies are well defined and mid to highs are sufficiently detailed. For power, the unit relies on a built-in Li-ion rechargeable battery (charged via USB) which has a reported battery life of around 5 hours between charges. You can also use this speaker with non-Bluetooth devices via the 3.5mm headphone jack (cable not supplied).
Logitech's Bluetooth Boombox has no less than 4 individual powered drivers to deliver audio. It has two 3-inch neodymium drivers and two 1/2-inch neodymium tweeters. There's also a set of four 2-inch radiators to maximize bass sounds -- all this adds up to 30W of well-balanced audio from lows to highs. As well as being compatible with the iPhone, iPod Touch, and iPad, you can use it with virtually any device that has Bluetooth -- this includes MP3 players, PMPs, tablets, and other audio sources.
To save the hassle on batteries, Logitech's device has a built-in rechargeable Ni-MH battery which has a reported battery life of up to 6 hours on a single charge.
The Creative D200 is designed for wireless home entertainment (mains powered) rather than being portable as its little brother (Creative D100) is. It has a nice glossy piano black finish to it that will look good in any of your rooms. Weighing in at a solid 3.6 pounds, the build quality is excellent with the controls being conveniently situated at the front of the unit. Creative have also excelled on the D200's audio output too -- the bass port on the rear on the unit gives enough audio thump for any room.
Another handy feature worth mentioning is if you've got existing audio equipment that's not Bluetooth compatible (like an MP3 player, smartphone, laptop, etc.), then there's also a 3.5" auxiliary input at the rear of the unit. This makes sharing music flexible using almost any gadget that's got a headphone socket.
Coming in a range of colors, the Nokia Play 360 is an ultra-portable Bluetooth speaker that gives you a 360 degree sound output. It's ideal for listening to music just about anywhere and has wide compatibility with Bluetooth enabled devices such as smartphones, MP3 Players, tablets, etc. It's got a built-in rechargeable battery (replaceable Nokia Battery BL-5C) that has a very impressive run-time (reported to be 21 hours at 60% volume). The Nokia Play 360 also comes with a 3.5mm cable for connecting devices that have a headphone socket.
If you don't need a stereo setup (although you can link up two units to achieve this), then the Nokia Play 360 outputs great sound and could be the ideal portable speaker solution.