If you enjoyed the Pro Silways, try comparing Harmonic Tech's "Magic" cable to Acoustic Zen's Silver Reference". They are both in line with what you already have, but a significant step up. I have had both, and settled on the AZ cable, but of course each system is different. Robert Stein at the Cable Company is a great help, but you might keep you eyes out at Audiogon for these cables around half retail cost.
I also switched my Pro 11 AC's to "less important" components (receiver, subwoofer), and now use the AZ Tsunami with my CD player, it was like giving my Sony 9000ES steroids!
I also switched my Pro 11 AC's to "less important" components (receiver, subwoofer), and now use the AZ Tsunami with my CD player, it was like giving my Sony 9000ES steroids!