$177.10,
http://www.killeentexas.gov/pdf/kmc/fines_list_2012.pdf
Honestly I would just try to do defensive driving. It should be like $110 court fee, $25 class, and $12 driving record.
I've had 0 luck getting killeen to give me a motion of discovery before I talk to the prosecutor at the pretrial hearing, after pleading not guilty. And even when set up for an actual trial date, it was like pulling teeth to get the information I wanted. By now, you're probably looking at a trial date around November/December this year or sometime next year if you decide to fight it.