Very good computer gaming speakers

I bought these speakers for use with a computer gaming system and I've been very pleased with their sound--in fact, so pleased that I got rid of the stereo system in my office and now use these speakers for all of my audio. The drawback--if you consider it one--is that I end up using my PC for all of my audio rather than my DVD player and receiver. This isn't really a problem since all of my audio now comes from an iTunes server. Anyway, the other drawback to this system is that while you can have a since auxiliary input (from another computer, or a dvd player, etc.) that aux input only feeds the front L and R speakers plus subwoofer--not all 5. There's no option provided for 4 or 5 channel stereo. On my model (same as this one I believe, though over a year old), there's no hardware control over bass and treble (apart from subwoofer volume level).