Yeah, as EeyoreX said, price is not indicative of quality with speakers.
I love my BA4800s that I got two years ago. They were over a $100 less than the Klipsch's that everybody loved, but I think the clarity of these speakers are fabulous, and they are (were) a much better buy than the boom boom of the Klipsch's.
Which brings me to another point: It also depends on what you intend to use the speakers for. The Logitech's and Klipsch's are great for games because of their powerful bass, while BA's and (from what I've read) Monsoon's are better for music because of their sound quality.
All that said, I picked up a set of Logitech Z-340s earlier this year for a spare PC, and it's a great buy for under $50. Still not better than my BA's, but then those cost almost 4 times more than the $35 I paid for the Z-340s. 🙂