I talked with EJ about this today at our audio club meeting. He said that the mkII amps are considerably better than the ST250, ST500, and ST1000. Some pretty substantial improvements. Also, and unfortunately, the 125 WPC versions never sold well. People get in the WPC race and want the higher power, so the 500s have traditionally been very good sellers. He also said that the level control are similar to the lower versions but just extend to a much higher volume level. Therefore there won't be any issues with with lack of control at lower volumes like I was concerned with. I hope that I explained it in an understandable way. He is much better at explaining this than I am
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