For $100 - Boston Acoustics BA790.
For $200 - Klipsch ProMedia 2.1
FWIW for $140 the Boston Acoustics BA4800 4.1's are tough to beat. I went w/ the Klipsch simply because my office couldn't accomodate the 4.1 setup. The ProMedia's want a relatively flat eq setup, but when you get it right they cook <g>.