http://www.newegg.com/app/ViewProdu...=22&manufactory=1316&DEPA=1&sortby=14&order=1
Currently 4 bucks for shipping via FedEx, making that 81 bucks
Pretty stripped of features, but it does feature USB 2.0 and the Via KT333 chipset. AOpen is pretty solid, although often overlooked due to not catering to the overclockers. I can't speak for Biostar, never having used them, but MSI is pretty good. However, that 2nd Biostar board looks pretty good.
Newegg has it for $73 with free FedEx shipping. It has a few more features than MSI, and uses the KT400 chipset.
Creative's drivers are bloated. The technology is good, but Creative doesn't seem to want to conform to some of the PCI specs, which have caused problems with previous Via chipsets for some people. Also, IMO, the Hercules Fortissimo II that I have sounds better than the Audigy, and is also almost half the cost.
The CMedia chips are fine, but they didn't have an EQ in the drivers last time I used them, and that can really limit how good any sound chip can be.
Also, the tough part here is that most companies don't include a bracket to take advantage of the 5.1 sound.
The 2.2 audio is referring to the version of the AC97 audio---which is very basic and not very good if you're an audiophile. You can either look into spending a bit more for the motherboard and get the bracket (Newegg's pics show you what's in the box) or you can buy a separate sound card. Soyo uses the CMedia chip and usually includes the bracket, but their motherboards run on the expensive side.
Yes, 6 channel sound=5.1 channel=5 speakers (2 front, 1 center, 1 rear) and 1 sub.