Sorry, my friend, but you will need to stay within reason of the OEM tire specs based upon wheel diameter. Probably the most important criteria will be tire diameter, or the height of the tire. Generally speaking, I really wouldn't call these low profile tires, but you need to stay no taller than 25" up front and 26" in the back or you'll rub rubber on some bad places.

Since you live in TX, look at Ultra High Performance Summer tires. No need to go Max or Extreme performance, based upon your drive style.

The OEM sizes are 225/40R18 up front and 255/35R19 in the rear. You can go as wide as 255/35R18 fronts and 285/30R19 rears if you chose, without any significant clearance issues, but for quite a bit more money. Note that some tires have rotation-specific tread while other treads are asymmetrical, your call. Buying an asymmetrical tread tire that can be mounted on either side of the car can make life easier in the event of a flat out in the middle of no-where. Personally, I like the Bridgestone Potenza RE760 Sports ... a nice inexpensive, asymmetrical, quiet and comfortable riding tire. Also look at General Tire and Kumho if money is the driver.

In any event, you can anticipate spending at least $700 and up to $1,500 for four new shoes shipped, plus mounting costs. A lot of folks on the Forum buy on-line from TireRack.com ... a real user-friendly site and store .. with great selection and customer service. Have them delivered to and mounted by a local shop you can trust for $25-$50 a tire.

Good luck. Use the Forum Search for more info.