Mcintosh MC7100 opinion

Hi Everyone,

    Love to get some of your opinions.  I have a B&W 805S and earlier this year I upgraded from a NuPrime ID-8 to Parasound Halo Integrated.  Still I'm not able to the 805S's sound to open up.  I'm not sure if I simply have a defective speaker or just need a lot more burn in time or need more amp.  I've an opportunity to get an older Mcintosh MC7100 for $700 locally (that's all I can afford right now) and use my Halo Integrated as preamp  I'm wondering what you all think about getting something almost 20yr old.  Or am I better off waiting another year and try something new.  Thanks ahead.

LL