Hello pvcarver and welcome to thecarversite.com. Glad you found us!
Almost any preamp will work with those amps, but a C-1, C-11, or a 4000t is almost magical. All three of those preamps can be modded to where they are magical. I hope you find a combination that you love. If you have questions, feel free to ask. We love spending other people's money.
Once you get to Novice status, please consider uploading some pics of your gear in the Members Systems area. We all love pics of all kinds of stereo and home theater gear.