I am considering the purchase of the 11880 versus the 9900. Does anyone have an update on the quality of the prints and long term performance of the two printers?
What are you using it for?
In terms of long-term performance, the 9900 has the advantage of using Ultrachrome HDR inks which, according to Aardenburg tests, seem to have a significant edge longevity-wise compared to the Ultrachrome K3 inkset used by the 11880. Neither set has the permanence of Canon or HP inks, though.
As for colour gamut, that only comes into play if what you're printing actually has colours in the extra gamut range provided by the 9900.