Tzh21y - I agree with Rob on the RB300. It's an excellent arm for the price, but I don't think that you'll find it up to the task of completely eliminating sibilance distortion.
If you want to try Rega, I would suggest giving the RB1000 as it supposedly has much higher bearing quality and tolerances.
If you want to try Rega, I would suggest giving the RB1000 as it supposedly has much higher bearing quality and tolerances.