Best used 2 channel preamp for 2500.00.

Hi to all the experts out there. I have a sims titan 5 channel amp (basically 5 channels of the w-5). I would like to mate it with a great preamp for music. The front runner right now is a Audio Research LS-25. What else should I look at? Are there older model AR's that will do just as well? I plan on getting a arcam FMJ 23 CD player. My speakers are custom made Scan speak driver. Thanks for any help you guys and girls can give me!!!!!