Are you set on living in Edmond for some reason? It's not bad, but I know a lot of cars that have been damaged up there. I can't explain it, it just seems like certain snotty kids like to bash cars in once or twice a year - and a block or two at a time. Slashed tires, eggs, baseball bats to cars, stupid crud. Take a look online and you'll find the stories, I think it may be that area of Edmond, but it makes insurance higher for that zip code too.
As for schools, they are pretty nice up there overall. There are some areas where you'll run into the spoiled brat issue more, but it's Edmond.
Vehicle taxes are cheap here (I think). I moved here from Chicago when we were stationed at Tinker AFB, and everything was cheaper then (1997). Since moving here Oklahoma has dropped the state inspection. The police will get you for bulbs out usually, especially if they think something else is wrong. So if you are speeding a little, and a blinker is out, you have a better chance of getting a ticket. Broken windshields are the same way, a single crack across the driver's side usually is ignored, a group of cracks is not. The passenger side is almost ignored. I had the top driver's side dogearred for years with no issues. I had a rock hit my TJ right above the rearview mirror and it shot a crack across my driver's side allt he way to the bottom left corner and 4 cracks to the passenger side. I drove three years like that and got pulled over once for speeding, even then it wasn't mentioned I needed to fix it. There are more things to worry about here, like uninsured drivers. Keep full coverage, comp, and uninsured/underinsured or medical on your vehicles. My friend is three years into a lawsuit where an uninsured, suspended license, drunk driver hit her Camaro and totaled it sending her to the hospital -her reasoning - taking off uninsured/underinsured coverage lowered her bill $120 a year and everyone is legally required to carry insurance so why bother.
The DMV is different here. Comparing to Chicago though, not sure about Texas. You have the DMV here that does the testing for driver's licenses, when you pass they give you paperwork to take to the Tag Agency. The Tag Agency does your photo and driver's license, also your vehicle tags. The easiest thing to do to see if it's more or less is to call a Tag Agency and tell them you want an estimate becuase oyu are considering a move. They will look up your VIN and give you the estimate. I have a friend that moved from an area north of Dallas, he tells me that his car insurance increased in Oklahoma but the tag would be less. He moved from the boonies to the boonies, YMMV. Edmond Tag Agency number (405) 341-0742
On a separate note, expect to pay higher taxes in general in Edmond compared to other metro areas. Edmond also has the highest water bill by unit.