try a pair of 2-ways & a pair of subs w/active cross-over. best bang for the buck, and also easiest to place, imho (if you have the space) - you can place the monitors for best imaging, & the subs for best bass response. and, monitors generally image better than full-range single-box speakers. you *do* want the monitors to go low - say to 40hz - so the x-over point can be as low as possible - say 60hz.
