Preamp with theater passthrough. Option?

I am in need of a preamp that has a home theater passthrough? What are some good options without spending more than $4000. Are there any surround processors that may be a good alternative to having two seperate preamps? The two channel piece to my system is most important. I am currently using a Musical Fidelity A5 preamp and the surround is a Anthem AVM20. The Musical Fidelity needs top be taken out.