Mcintosh mx120 vs 121


What does the mx-121 have that the 120 does not. I found the mx-120 for less then 800 at a local store and trying to figure out if its worth it or save for the 121??
lkruer
The 121 pass thru 3D on the video side, The 121 is offered as a lesser priced MX151 where as the the 120 really was closer to the MX136. So I think over all the 121 would be a better performer on surround calibration.
i have a mx132. used as a 2 chanell pre-amp tuner. is there another mx that would do a better job for my needs?
I replaced my MX120 with a MX121. I didn't notice much of a sonic difference between the 2 units, but I do like that I can go HDMI from my cable box into the MX121. With the MX120 I went HDMI for the video connection direct into my TV monitor and COAX from the cable box into the MX120. I do like having a newer unit. I only use it for watching TV in 5.1 and think it works and sounds excellent. I really preferred both units over my old Marantz pre pro.