I use the Resolution Audio CD55. It has a variable analog output and I am hooked. I still use a preamp but my preamp doesn't have remote volume so I use the built in volume control on the CD player. I liked it so much I bought a second unit and have one in both systems. Bought both on Audiogon. Their is a fixed output available via a DIN type connector as well. I have compared my player to two of my friends well reviewed Marantz CD players and I feel the Resolution Audio player slightly outperformed both models overall. FYI - the owner/designer of Resolution Audio is a great guy and he makes truly innovative products. I have no ties with them in any way - just saying I like their stuff.
Brad
Brad