IMO your room is waaay to small for La Scalas. Before spending more money I would try a pair of Heresy IIIs. Use them stock on the floor, tilted). If you like the Klipsch house sound (albeit minus the shrillness) you might be very happy.
There are a lot of single driver speakers that will work great, some more to your taste and some not as much. Heavy rock is going to be a problem in a small, essentially square room. Maybe headphone for that?