I see the Chicago CL has a Fisher KX-200. I restored one and to be blunt hated it and actually the worst of the 7591's I owned. The other one I restored was a Eico ST70 which was a nice amp. I'm going to interject another opinion. Do you need the 7591 power. If not I've found for me a 6BQ5 amp is a much more musical sounding amp and the Pilot 602 I restored was amazing with the best sound stage of any amp or receiver I've ever owned and one I wish I still had. One of the few times in listening where the wife and I sat there slack jawed in awe of the sound washing over us. The Pilot was also loaded with Telefunken and Bugle Boy which didn't hurt but I also ran Telefunken's, Mullards, Bugle Boys, RCAs in my amps.