Sony SRS-T88-works great
If you need a lot more sound than any laptop or mp3 player alone will provide, then get one.For its small size and weight, and the amount of sound it outputs, its awesome.If you want 100 watts of power, then get 100 watts.I got 4 watts, and it weights less than a cd player.Plus, I use 4x rechargeable 2000ma or 2500ma AA batteriesand im good for hours and hours.Hook it up to my laptop or my MP3 player and im a portable music station.It pans out on the highest levels, but often that is too loud anyways. 90% of the time, even 50% volume is enough.