Hi everyone

I'm an old 2 channel fan and I am setting up a HT in my house. I have a ton of questions as I am new to 5.1/7.1
I have some vintage gear that I would like to incorporate into my new HT but a sales guy at a local store said it could not be done so I want to ask the experts here on this site before I fork over $ on new gear I may not need. My current gear was all bought in 1981 which I believe classifies it as "vintage." I have: Yamaha M-2 amp (265wpc), Yamaha C-4 preamp, Sansui TU 919 tuner and JBL L150A speakers. I would most like to incorporate my amp and speakers into a new HT. Is there a way? I was advised against using my JBL's because I would have to buy a center and two rear speakers (another brand) and they would sound terrible. I love my amp and JBL's and I know I would have to fork over major $ to get the same kind of quality if bought new. I would appreciate any suggestions and/or comments.

Thanks,
Jarhead