So, update. The Sonance guy came into Best Buy and let me listen to the Sonance IS10s, which is a slightly larger version of the one I was quoted.
They sound great. I mean, full bass and crispy highs and everything in between.
Now, please note: I'm NOT an audiophile. I'm a slightly-more-than-amateur musician and use pro audio gear to record at home, so I'm more discerning than your average consumer, but I don't have golden ears or anything. I do not claim any street cred when it comes to nerding out on audio stuff.
All that said, they sounded pretty damn good for being invisible.