I recommend this retro-looking $40 speaker from Borders Bookstore
http://www.urbanattitude.com.au/www/700/files/ms2_2375.jpg. It is far from being a good speaker but it s an editor's best bet against "false grandeur" You hear exactly what someone would hear listening to your video on a computer. Audio not panned centre? It will sound reedy. Hissy recording? You hear the hiss clearly. Peaked audio? Check! That's what I go for in a speaker. An unembellished and unforgiving cheap speaker that tells you exactly what's wrong with your recording.