I'll offer a suggestion for the lower end (as opposed to what is evidently "right," aka: "expensive").

I like Klipsch speakers a lot. The ProMedias work great for computers, and the similar system for home theaters would be the Quintets. However, if I were stepping up my system from crappy Radio Shack speakers to a decent set, I'd probably go to the Synergy system. (review)

The company also has some great stuff on their website. I've noticed that Best Buy has even started to carry Klipsch home theater speakers.