<< i'm going to buy the Altec Lansing 641's if they truly are the best. However, the 0.3% distortion at -10dB has me a little worried. I love listening to music. >>
The spec is <0.3% THD at -10dB full scale input voltage. I think that is a very respectable figure, especially given the price. That's well below the threshold of audibility, even if you listen only to pure sine waves. All it really means is to set the volume of your soundcard to about the middle of its range, to keep the input voltage to the speakers' amplifier at a reasonable level to avoid overdriving.
Now that I've had the 641's for a few days and done some tweaking and lots of listening, the only negative I have found is that the "large-ish" physical size and weight of the pieces made me have to rearrange a bunch of my stuff. And of course, like ANY speakers, the positioning of the units has a big effect on how it all sounds. I don't game very much, I mostly listen to music - and I am really pleased.
BTW, I have them connected to an OEM Audigy sound card, using the 4-channel settings for the card and speakers.
As to whether the 641's are the "best", that's my opinion, for under $300 I don't think you can do better.