mag-local DIY amp ka na lang if you want something cheap yet powerful. Some local enthusiasts here and in tipidpc sell homemade amps that are reasonably priced. Though its not as good looking as a commercial amps. If you want you can get the konzert amps or the bada amp.
those mackies are good sounding amps.. i was considering them but a little over the budget so i settled for another usa brand amp named Samson.