StarLancer, I'll give you a big thumbs up on the Klipsch 2.1 system. I've been running them for the past three years, and haven't had a moment that I wanted to swap them out for something else.
I've had an opportunity to check out Logitech (most I've heard have an overly-strong bass presence), Altec Lansing (just don't stand up to the Klipsch), and Cyber Acoustics (again, OK, but can't match up w/ Klipsch).
FWIW I had a Boston Acoustics 2.1 setup b4 the Klipsch. I was quite pleased w/ them. What sets the Klipsch apart are: brighter high end, more guts. I can literally rattle the walls in my office, using the THX theme. If you get the ProMedia 2.1's and can't find the THX theme, PM me w/ your email address and I'll forward it to you.
Another FWIW. Klipsch sells a set of Monster Cables for the ProMedia 2.1. Don't get them expecting a big improvement in sound or volume. Only get them if you want/must have them. If music is your main use, go for it. If gaming is your thing, then a 5.1 system might be more to your liking. I will tell you that when Quake came out I fired it up w/ these speakers, and the hair on the back of my neck stood up.
Don't think of saving $10 and moving down to the GMX A-2.1 system.
Jeff