Paul, I would disagree with recommendations on Cardas interconnects, especially the budget ones like the Cross. Yes, they tend to be warmer than most, but they introduce a veiled sound in the mid range and offer a muddy and ill-defined bass. You may be better off with an Acoustic Zen cable which, I believe, offer much better value and performance (also warmish sounding w/o brightness, but cleaner sounding than intro Cardas cables).
Also, the Black Diamond MK3 (NOT the MK4) cones tend to take some "edge" off the top end. You might want to borrow a set from a local dealer to see if it helps.
As for power cords, I find that it makes a reasonably significant impact on the Rega 2000. I have tried Synergistic, NBS and PS Audio power cords with great success. The result is a quieter and more dynamic sound with improved detail and imaging. I do not think this will fix your brightness problem though.
Good luck!
Also, the Black Diamond MK3 (NOT the MK4) cones tend to take some "edge" off the top end. You might want to borrow a set from a local dealer to see if it helps.
As for power cords, I find that it makes a reasonably significant impact on the Rega 2000. I have tried Synergistic, NBS and PS Audio power cords with great success. The result is a quieter and more dynamic sound with improved detail and imaging. I do not think this will fix your brightness problem though.
Good luck!