I am using an Arcam FMJ CD-23T (cdp), an ARC SP-3c preamp, and an ARC VT100 Mk II pwr amp. I just replaced the output tubes in the VT100. Re-set the DC balance, and re-set the bias. It's sounding great. I am always looking at what to upgrade next, but for now the Adagio's are staying. BTW, I am also using a Focal JM Labs SW900 subwoofer.