I would like to choose an older high quality HT receiver which had 5.1 channel analog inputs to use with a DVD/CD player having built in decoder. An older top of the line dolby THX receiver like a Technics SA-TX50 or similar. Any advice out there? There must be a lot of them that originally only had a Dolby prologic decoder on board. I would also like it if the receiver had pre-out/main-in loop for biamping or adding equalizer. Any help appreciated!!