I'd plead nolo.

I've been to jail twice for "reckless driving", the first instance the officer knew I was speeding but was unable to accurately determine my speed so he decided that "reckless driving" was a better charge. The second time (in the corolla) I was clocked doing 74 in a 45, but had literally accelerated to that speed as quickly as possible on the main street in front of my neighborhood to determine if the clutch line was leaking fluid, and was slowing down before I saw the officers in the road. They looked at my license and saw that it was a class D (due to the last arrest I wasn't supposed to get a class C for a year) and decided to give me reckless driving instead of 29 over.

I'd plead Nolo if I were you, assuming you got "30 over" and not reckless driving like I did.

Needless to say insurance companies love me.