So long as you temper this recommendation with the fact that I am a die-hard, loyal eXcelon fan (my deck and both my amps are eXcelon)...
The KDC-X889 is a bit more feature-packed than the KDC-MP919 and if you get it from an authorized dealer the warranty is twice as long as the normal Kenwood line. I certainly don't think you'd be
unhappy with it. The $450 MSRP is a bit steep for my tastes. You can get it much cheaper like on
eBay or whatnot but as Kenwood is fairly picky about who they authorize to sell their eXcelon gear (no online sales outside of
Crutchfield are authorized) most likely it will not carry a warranty of any kind.