Find yourself a clean set of Minimus-7 speakers (yes, from Radio Shack) and optionally upgrade the crossovers. They have a die cast enclosure and actually sound

Find yourself a clean set of Minimus-7 speakers (yes, from Radio Shack) and optionally upgrade the crossovers. They have a die cast enclosure and actually sound pretty great compared to the various plastic speakers I have used. You could certainly add a subwoofer to that setup but it's worth listening without one first.