There are 3rd party texting apps in Google Play. Just search for "text" and see which one looks good. After install, when you open messaging you should get the chance to select which app and "just once" or "always." If you ever pick "always" it makes that app your default and then you stop getting asked.
Try one or more out as "just once" before deciding on the new default.
I always hear the name Go SMS Pro mentioned, but really know nothing about the different apps and what they offer besides expanded emoticons. Check the reviews and descriptions.