Good points. I have a 'reference' LP that I'm very familiar with that I use – Simply Red's Picture Book – as it is a good quality recording and I know every detail in it. As is, the Denon sounds bright with little bass, but I've since read that the Denon needs to be angled down somewhat, due to the way it was designed in the early 60's with those record grooves in mind, hence the headshell should be significantly lower than the counterweight end so the arm is not perfectly horizontal to the record, but with an obvious angle down so the tip of the stylus is cutting downward into the groove. With this, and all the other stuff in mind about mass missmatch I'm going to stick the Denon on eBay and cut my losses and lose whatever I lose on it as I doubt AudioVisual Online will refund me now it has been fitted to an arm, and buy the Benz Micro Gold as I don't think the Benz Gold has any issues with the Rega RB300, not that I've been able to see with my research around the web anyway.