I have been putting off this update because I deleted a lot of the sprint bloat, and figured this would effect the update. I dont feel like spending the time to go all the way back to gb and work my way back to the new zvk and root.... again. so I have been just been putting it off.  I found that using a root explorer I can just delete the update file and then next time im prompted to update I click install now. the phone counts down to to restart, then I get an error that says some google service has stopped..  then the update goes away for at least two weeks. rinse repeat.  
any opinions on this.  should i just update? if so whats the easiest way to update and keep my root?