It is amazing what a little 200 watt amp can do. I have a different small 200 watt head and used it for a while with an inefficient speaker - and liked it a lot, but wouldn't have considered playing out with a full band unless I had to. But then I tried some much higher efficiency speakers and man did it come alive. It is all in the cab! Now I could use my 200 watter in a full band, if I wanted to. I am not surprised by the OP's experience; 200 watts into 2 or more efficient speakers will go a long way.