I was given a Klipsch ProMedia 4.1 Computer Speaker System from my dads coworker about 8 years ago. They are phenomenal and like you described, they're loud as hell. Can't even touch the upper levels of sound just because of how loud they can get. The 2.1 system is going to be extremely similar if not identical/better than the 4.1 system. I couldn't recommend that set enough.
Here is a review of the same system (just wireless) http://www.maximumpc.com/article/new...wireless_twist
Here is another set to look into as well, I've read good things: http://www.amazon.com/Corsair-Gaming...Corsair+SP2500