Larry,

I am not familiar with the Logitechs. The Creatives T10 and T20 have no subwoofer which may seem an omission. But believe you me you can do without them. However I was not talking volume here but quality.
If you play the Micro in your livingroom by itself it sucks. If you connect them to e.g. these Creatives it completely comes to life and delivers.
Not in volume ( although that too is better) but in quality................
And considering the price and size it is a steal to match.

regards.
John