Try the Audioengine 5's. A musical active speaker with plenty of power and some low end. The also have a wood veneer for $100 more. When I checked into active's for a 'puter they were the only ones that made sense to me. Quad makes a couple actives also that are reasonably priced used.
Btw, the Audioengine models come with darn nearly every kind of hookup connection and wires you may need.