Been looking at Crown power amps to power a PA. I currently have 2 monitors (looking to grow to 4 perhaps or add some mains in the future). the monitors I have are 250w @ 8 ohms. Anyway I have been looking at the XLS 1000 and 1500, but have also seen the XLS 202 and 402. anyone tell me quality, price, experience, would they work with the monitors I have now? Any insight would be great.