Best very small Speakers (at any price)?

I'm building a portable system that will fit in a small equipment suitcase. I'm using a 47 labs Gaincard (50w/ch) amp (that has stepped attenuators to eliminate the need for a preamp) and some yet to be named portable cd player. Has anyone heard some very small (maybe 9"x6"x6" or less) speakers that blow you away? thanks