I'll suggest M&K like I always do. (I'm sure people are getting sick of this by now ) Their smallest speaker line are their Xenon speakers. I've seen them in person next to Bose (yuck!) and they are about the same size. There's a great review of them on the "Secrets of Home Fidelity and Hi-Fi" site. Here are the two links.
www.mksound.com
www.hometheaterhifi.com