Yeah, those will probably be the least expensive 7.1 speakers.
I would recommend going with a quality 5.1 over those. Maybe Logitech Z5300s. Will sound better, and the extra two speakers won't add much if anything (especially if they don't put out that good of sound).
As far as I know there are very few 7.1 comuter speaker sets. I think Creative is about the only one who makes them (the Inspires you listed and the Gigaworks S750s).