I have the Logitech Z-2300 speakers for my computer, and I would definitely recommend them. They are THX certified and have plenty of power and range. I would say the system is definitely geared more towards gaming/movies, as the subwoofer is pretty powerful, but music still sounds great.
As has been mentioned, your not going to notice the stereo effect with the Bose system, and you will have weak bass without a subwoofer.