Easy maintenance XB4 17 and XB2 17?

[Kababking]

I am currently in the process of jumping ship from Durango.
The two options I am looking at at the moment is the K2 and KC vs XB417 and XB2 17.

I have no strong feelings for either, and hence I am a proper weekend warrior with all preparation for races are done the night before at 3am
I am probably most interested in the easiest package to keep at a decent race level with minimum maintenance.

Any inputs from you guys would be appreciated!