Choose between McIntosh MA9000 used vs MA8950 new

My Dad uses Sonus Faber Elector Amator III with a REL S/510 with his 8950 and it's a great sounding combo.  

The 9000 chassis is deeper and may be a challenge in some cabinets / stands also.  

I would go new,  keep it nice and you are literally preserving your investment.   The few Mc pieces I have had over the years brought me more than I spent on them at resale.  

Echoing the comments above, I’d get the MA8950:

• 200 watts plenty
• Don’t buy cosmetically damaged equipment; difficult to resell
• 8950 has HDMI input
• DAC 2 is excellent and replaceable

I own the MA8900 paired with SonusFaber Nova 5s and the setup is excellent in a large room. The DAC 1 is excellent too - just missing the HDMI but I may buy the newer DAC for $1k. 

I own an MA8900 paired with B&W 804 D3s and run an Aurender N100 (USB connection) into the internal DAC.  I recently upgraded to DA2 module and there is a marked improvement over the DA1 module.  I agree with several people here and would go with a new MA8950 as 200 watts is plenty of power and headroom.   I listen primarily to classic rock, progressive rock and some jazz.  I don’t find that I’m missing anything with the 200 watts of power on tap.  I also listen to a lot of vinyl on a VPI Prime Scout table running through the internal phono preamp. Again, for my ears, I’m missing nothing.  Get the new 8950 and a factory warranty and be happy!!!

I am mostly a tube guy and I really like the 8950.   It will give decades of enjoyment.  It has an excellent HT bypass mode should you ever want to integrate.  An awesome Amp for sure.   3 year warranty, new amp smell....

Thank you everybody for your inputs, I think I shall go the route for the new Ma8950, though a bit higher in price, but I shall keep it long term with my speakers.