If you can find a decent receiver and bookshelf speakers for @ $220 - please share your source.
Having said that, I agree. The Logitech Z-5500 set of speakers is worth $200, but that's not really saying a lot. I've auditioned these speakers and was underwhelmed to say the least. I have some $50 Altec Lansings that sound just as good. No, they don't get as loud, but loudness != quality.
It might seem like I'm being hard on the Z-5500's. I'm not. They've squeaked out as much quality at that pricepoint as one can expect for a complete 5.1 package.
The Pioneer HTIB setup is probably no better.
If you absolutely must upgrade your computer speakers for around $200. Get yourself a 2.1 package. You get more speaker for your money that way. Altec Lansing's FX6021 2.1 setup sounds much better than any 5.1 PC gaming setup I've listened to.