Hey blingbling, maybe not as tiny as the Bose acoustimass type cube speakers, but you can probably get away with small mini-monitor speakers in conjunction with a subwoofer.
My new favorite is the NHT model SB-1 which measures 6" wide by 10" tall. The Paradigm Atoms are getting good reviews in magazines, but I haven't personally heard them yet.
Don'te forget that chic stands are an important part of selling your wife on cute speakers.
Don't be concerned with TXH certification, especially on speakers. Not only do many great products opt not to pay to have it, but many products that do will not necessarily be to your personal liking.
Good luck, and listen to EVERY speaker you can.