To name a single brand is impossible. Also, what is your goal? Impeccable sound quality, spl, etc? If you are looking to truely reinstall your audio system (top to bottom) and have the best, Bose is not it.

I would probably recommend something like Image Dynamics for one. They make a very nice line of reasonably priced drivers (subs to tweets) that, unless horribly installed, will give a more robust and accurate sound than Bose. Thats just one option, and certainly not the only one.

Amps? Processing? Many many many choices.

Your end result is a product of labor and thought, more so than throwing money at it. So if you get a game plan of what you want, find a nice line of equipment in your budget, and put the effort into the installation and tuning, you can probably make Radio Shack speakers sound good. Of course, the nice equipment doesn't hurt either...just saying the installation is as important, actually more important than the equipment you pick.