I take it you were charged with reckless driving and not simply speeding? If that is the case then if you are found guilty it is a class one misdemeanor. Which in the commonwealth is punishable up to "Confinement in jail for not more than twelve months and a fine of not more than $2,500, either or both." Those are your max. punishments. I think you have the right idea in consulting a lawyer. I wouldn't try arguing the radar, maybe entering some mitigating circumstances if there were any. Good luck, let us know what happens.
§ 46.2-862. Exceeding speed limit.
A person shall be guilty of reckless driving who drives a motor vehicle on the highways in the Commonwealth (i) at a speed of twenty miles per hour or more in excess of the applicable maximum speed limit where the applicable speed limit is thirty miles per hour or less, (ii) at a speed of sixty miles per hour or more where the applicable maximum speed limit is thirty-five miles per hour, (iii) at a speed of twenty miles per hour or more in excess of the applicable maximum speed limits where the applicable maximum speed limit is forty miles per hour or more, or (iv) in excess of eighty miles per hour regardless of the applicable maximum speed limit.