at least in georgia, you can only plead nolo once every 5 years. The only thing it does here, is avoids points for that offense on your motor vehicle record. It will still be reported though, and your insurance will still see the conviction. If texas works the same way, you are better not using it, unless the points will get your license suspended. Save it in case you ever really need it.
What I recently did in GA, was went to court, and before the case was heard, asked to speak to the solicitor. My record was clean, and I asked him to reduce it to something that wouldn't affect my insurance. He dropped it down to 14 over, and told me their city didn't report anything under 15. $100 fine and $75 driving school for him to do this though. My original ticket was for 79/55.