Kenwood X891 or X791
 

Hey everyone I own 98 vw golf, The sound is great but I need to upgrade my deck. I've already thrown 2 12" Hertz in the trunk with a nice Kenwood X amp.
like I said I need information on the best Cd Decks,

currently I really like the Kenwood Excelon KDC-X891 and the X791.
I have found them online with the X891 for $40 more. ($184)

I want all of your opinions on, different brands I should concider, Whether the X891 is better, If upgrading to the X991 for $200 is worth it. and anything else related to New Decks.
Thanks a lot.