whats the best addition u have bought for system

I would look into changing out the receiver for either seperates or an int. amp./tuner. I would not change the cables. You have very nice spks. that need better amplification. Recently, I changed out the stock spk. binding posts on my Rega Brio 3 Int. amp. to BP Hex's. The Brio sounded superb before but now the sound is absolutely better. Smoother, warmer, less grain, more detail w/o any brightness. I just noticed in today's listing that two NOS Rega int. amps are being offered. I would definately give them some serious consideration. Best Regards, Bill.

Going from an Acurus preamp to a Classe preamp.

Maybe think about going compter audio and build up you music library. Your system seems nicely balanced and you might have to spend a lot more money to make a small difference in sound. With all your cd's available at the touch of a mouse it will make you listening time more fun.