Time to upgrade McIntosh MX135, maybe.

How do you compare your MX136 to the MX121 sound wise only.
thank you.

I have an almost as old MX136 that I use as my main pre/pro on my HT system. I use an Oppo 105D now and have used a 205 with it. I have the HDMI from the Oppo  going directly into my projector and the audio going into the Mx136. It sounds and looks fantastic without needing to get another pre/pro. I have had many Oppo's connected in this way from the 83 to the 205. When I updated the Oppo everything update without needing to purchase another pre/pro. Not sure what my next upgrade will be in the future since there are no more Oppo's being made.
I had a Marantz for a very short time in another system and for me it wasn't even close to the sound quality of the MX120 that replaced it or the MX121 that I have now. Writing this down makes me think that I may change things around to often. Just my 2 cents.