Forget Bluetooth Speakers, just get a Bluetooth Receiver and pump your audio from any Bluetooth equipped hardware to your main Hifi system (where there is generally a good set of speakers)!!
I know this is an old thread, but better to put some useful info into an existing thread than create a new one.
I have one of these:
http://www.juno.co.uk/ppps/products/378219-01.htm
In case the link above ever become's dead, its a DC-5BT Bluetooth Audio Receiver.
A small Glossy Black box (smaller than a cigarette packet) than connects to a spare Audio Input on your HiFi Amplifier. (some later HiFi Receivers have BT built in, so if you have one of those, you don't even need this).
You can then Pair up any Bluetooth device and play your music etc through your Audio Amplifier without the need to connect wires.
I can use my iMac as an audio jukebox for parties. With the full screen activated (on the coverflow window in iTunes), it looks amazing on my 27" iMac, huge album art scrollable with the left & right arrows, people can just walk up and select the music.
I have everything paired up, including my iPhone and MacBook Air, sending the output to the BT receiver is a push of a button and it sounds amazing because I have some Bose AM16's setup in my lounge
Its a cool gadget for the price, it even has a built in battery, which will run it for 2+ hours even if you don't have the BT receiver powered.