Honestly you really can't go wrong with either set, both the Logitech?s and Altec's are a good set of speakers. I've had the Logitech?s for a few weeks now and am pretty impressed with their sound. I haven't heard the 641's in detail yet but I have heard other high end Altec?s and in my opinion the Logitech?s have better sound quality. As far as overbearing bass I can see that being a potential problem if you aren't careful with sub placement. As long as you keep the sub, driver, and port away from corners and similar areas bass response should be just fine.