That’s true, I love my CC121 too. But the CMCs have a better chance for future additions and updates.
If you look at how much updates and new features we’ve got for the CMC series compared to the CC121 lately then I’d say that the CC121 is a dead product from Steinberg’s perspective. I’ll doubt that we’ll see an updated driver for Windows 8 or for the next OSX version, let alone new features (I’d love to see the REAPER features added).
I don’t think that I’d spend such an amount of money today for a depreciated product (especially if you look at Steinberg’s hardware product history).