I got the CD-2, DAC3, e.One S300iUSB integrated and e.One Ref100 mono block amps. The cool thing about this line besides the fact that is sounds great, is the flexability. The CD player, DAC have volume controls. So, no need for a pre amp. You can start with the CD and S300 2 channel amp. The S300iUSB integrated is 150 watts and sports a USB / DAC input. Hook up your iTunes (use lossless for best sound quailty) and that's it! A nice one box solution. Come check it out!